A brain imaging study showed that, in healthy children, peak cortical thickness occurred around the age of 7.5 years, and in children with ADHD, on average around 10.5 years. This finding implies that children with ADHD ____.
a. will never catch up with their same-age peers.b. can be expected to lag behind their same-age peers in some tasks but will eventually experience improvement.c. can be expected to go through puberty approximately 3 years behind their same-age peers.d. will never be as intelligent as their same-age peers.
Answer:
The correct answer would be option B.
Explanation:
In neural antomy, cortical thickness is the morphomateric calculation or measurement of the brain that provide the information about the overall thickness of the various layers of the cerebral cortex.
The normal range of the peak cortical thickness is around 7.5 to 8 which means that the same age group kids brain is develop at this age where is in ADHD child it is found according to the question is 10.5 years, which means he is taking 3 years extra to develop the cortex of the brain which means he would be slow in comparison to the similarly age group kids but will improve with the time.
Thus, the correct answer would - option B.
Vascular tissue helps plants transport water against the force of gravity. Because of this, plants that lack vascular tissue do not grow very tall. True or false?
Answer:True
Explanation: plants which lack vascular tissue is known as non-vascular plants. Vascular tissues consist of Phloem and Xylem.
Xylem vessels transport water and mineral through the plants while phloem vessels transport nutrients and products of photosynthesis via the plant.
Non vascular plants lacks features like Bark, so they do not grow very tall, they remain low on the ground. Examples include; mosses, liverworts etcetera.
Final answer:
The statement is true; vascular tissues like xylem and phloem enable plants to transport water and nutrients effectively, supporting taller growth. Nonvascular plants lack this system, hence they generally remain small and close to the ground.
Explanation:
The statement that vascular tissue helps plants transport water against the force of gravity is true, and therefore, plants that lack vascular tissue do not grow very tall is also true. Vascular tissue, including xylem and phloem, is crucial for the distribution of water, minerals, and nutrients throughout the plant. This system is similar to the human circulatory system, though plants do not have a heart to pump fluids. Instead, plants rely on other mechanisms, such as transpiration and root pressure, to move water and nutrients.
Nonvascular plants, such as mosses and liverworts, lack these specialized tissues. Consequently, they must rely on direct water absorption and diffusion to move nutrients, which limits their size and height. Vascular tissue allows plants to transport resources efficiently over greater distances, supporting larger and taller growth. This evolutionary adaptation has enabled vascular plants to thrive in a wide range of environments, leading to the diversity we see today.
Plants like ferns, which evolved early in plant history, demonstrate the advantages of vascular tissues as they can grow relatively tall and survive in drier environments compared to their nonvascular counterparts. The presence of vascular tissues has been a key factor in the successful colonization of land by plants.
The lemming is a small mammals with a very high daily energy expenditure for its size. Based on what you learned in the panda case study, what would you predict about the lemming?
A) It would have a very large brain, heart and kidney for its sizeB) It would be a very active animal.C) It would have a very high metabolic rate for its size.D) B and C only.
E) All of the above.
Answer: B and C only (Option D)
B. It would be a very active animal.
C. It would have a very high metabolic rate for its size.
Explanation:
Lemming is a mammal that has relatively small body size. Due to its small body size, it encounter issues when exchanging material from the extrinsic environment. Lemming’s surface: volume ratio affects its energy consumption. It consumes higher energy at much rates compare to their body size.
However, more energy consumption is directly proportional to increased metabolic activities within the body system for lemming. Hence, the activeness of lemming is determined by the rate of catabolic and anabolic reactions that takes place in the body system for their respective life activities functions (e.g thermal control).
Suppose that in 2008, 859 comma 200 citizens died of a certain disease. Assuming the population of the country is 213 million, what was the mortality rate in units of deaths per 100,000 people?
Answer:
First, we have to divide the number of dead citizens by the number of the total population.
859,200/213 million
= 0.00403380281
Then, we multiply the result by 100,000 to obtain the mortality rate.
0.00403380281 x 100,000
= 403.380281.
This means that the mortality rate of citizens killed by this certain disease in 2008 is of 403,38.
Sam was just born, and his skin looks blue, his heartbeat is rapid, and he is crying. He is also rather weak and inactive and has slow respiration. What is his Apgar score?
Apgar score is [tex]6[/tex]
Apgar ScoreThe Apgar score is an index that is used to evaluate the state of a newborn infant. It is based on a rating of [tex]0,1,2[/tex] for each of the five features of color, heart rate, response to stimulation of the sole of the foot, muscle tone, and respiration, with [tex]10[/tex] being the perfect score.Sam has only recently been born, and his skin is blue, his heartbeat is rapid, and he is sobbing. He is also feeble and sluggish, with slow breathing. His score is [tex]\boldsymbol{6}[/tex]For more information:
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Sam's Apgar score is 5, which is considered low and may indicate the need for immediate medical attention.
Explanation:Sam's Apgar score can be determined by evaluating the five criteria: skin color, heart rate, reflex, muscle tone, and respiration. Each criterion is assigned a score of 0, 1, or 2. Based on the given observations of Sam, his skin color is blue (score 0), his heart rate is rapid (score 1), his reflex is crying (score 2), his muscle tone is weak (score 1), and his respiration is slow (score 1). Adding these scores together, Sam's Apgar score is 5. This score is considered low and indicates that Sam may need immediate medical attention.
The plant cell wall
A. is found just inside the plasma membrane.B. is a protective structure made of cellulose fibrils.C. regulates the composition of the cytoplasm.D. makes food by converting light energy to chemical energy.E. is very similar to the animal cell wall.
B. is a protective structure made of cellulose fibrils
Mark as Brainliestwhich of the following is true of insulin?
a. secreted by the posterior pituitary gland
b. deficiency causes diabetes insipidus
c. secreted in response to decreased blood glucose
d. helps regulate blood glucose
Answer:
d. helps regulate blood glucose
Explanation:
The insulin hormone is secreted by beta cells of the endocrine portion of the pancreas. Insulin is released in response to raised blood glucose levels. The function of this hormone is to make the body cells to take up the glucose from the blood. It specifically targets the liver and muscle cells and makes them absorb glucose from the blood. The absorbed glucose is stored in the form of glycogen in these cells and the blood glucose levels are restored to the normal range.
What made the plant breeding studies performed by Mendel more successful than plant breeding studies performed by others?
Answer: Mendel's choice of garden peas for his studies
Explanation:
Mendel's chose garden peas for his plant breeding studies DUE to the easily distinguishable and discontinuous traits the plant possess.
This traits include:
- flower colour
- flower position
- seed colour
- seed shape
- pod colour
- pod shape
- plant height
He found each of these traits can be expressed as DOMINANT and RECESSIVE i.e they can be easily distinguished by everyone; so he chose garden peas for his plant breeding studies UNLIKE others who chose some other plants with less distinguishable traits
Answer:
Mendel is known as the father of genetics. He explains the laws of independent assortment, laws of segregation and concept of dominance in the pea plant.
He chose Pisum sativum that acts as a perfect model plant for the study of heredity. The plant have short life span, self pollination and cross pollination is also possible. No blending of characters in the pea plant and limited traits are present in the pea plant.
Women who use birth control pills are more likely to develop pelvic inflammatory disease (PID), iron-deficiency anemia, and osteoporosis than women who use other forms of contraception. True or false?
Answer:
False. Women who use birth control pills are not most likely to develop PID, anemia and osteoprosis.
Explanation:
Birth control pills are basically used to prevent pregnancy. Birth control pills work by preventing ovulation. No egg is produced, so there is nothing for the sperm to fertilize. Hence, pregnancy cannot occur.
Major side effects of birth control pills are
1)intermenstrual spotting
2)nausea
3)breast tenderness
4)headaches and migraine
5)weight gain
6) mood changes
7)missed periods
8)decreased libido
9)vaginal discharge
The claim that women using birth control pills are more likely to develop PID, iron-deficiency anemia, and osteoporosis than those using other forms of contraception is false. PID is mostly caused by untreated STIs, not contraceptive use, and there is no straightforward link between birth control pills and anemia or osteoporosis.
Explanation:The statement is false. Women who use birth control pills do face certain health risks, but the claim that they are more likely to develop Pelvic Inflammatory Disease (PID), iron-deficiency anemia, and osteoporosis than women using other forms of contraception is not entirely accurate. While birth control pills can be associated with health risks such as blood clots, particularly with the combined pill which contains both estrogen and progesterone, this does not directly correlate with an increased risk of PID. PID is primarily caused by untreated sexually transmitted infections (STIs), not the use of birth control pills. Additionally, the pills do not directly cause iron-deficiency anemia or osteoporosis. The pills may impact menstrual flow and, therefore, iron levels, but any association with anemia is not straightforward. Similarly, there is no clear evidence that birth control pills increase the risk of developing osteoporosis; in fact, the estrogen in combined pills may have a protective effect on bone density.
When an infant is upset, a caregiver's soothing actions influence the infant's neurobiological regulation of emotions and lower the level of stress hormones.
A. True
B. False
Answer:
True
Explanation:
Infants unlike children of higher age and adults carry emotional baggage and distress and are unable to come out of that without assistance of elders. Therefore, a care giver has to take care of fulfilling the emotional requirement of infants by adopting and using soothing strategies such as hugging, careful touch etc.
An infant has undeveloped and un-specialized anterior cingulate cortex which plays an essential role in acting as an interface between cognition and emotion. Therefore, soothing actions and strategies help an infant from dealing with his/her emotional distress.
Hence, the given statement is true
Some very important persons such as Japanese Emperor Hirohito and China's Premier ZhouEnlai were kept alive during their last days by many transfusions of blood. Without knowingfurther details of their ailments, which of the following functions most likely provided the mostsignificant contribution to keeping them alive?Select one:
a. oxygen and carbon dioxide carrying capacity
b. supplement of hormone levels
c. provision of organic nutrients such as glucose, amino acids, and fats
d. provision of albumin and fibrinogene. provision of immune antibodies
Answer:
D. provision of albumin and fibrinogen. Provision of immune antibodies
Explanation:
Albumin , fibrinogen and immune antibodies are needed before any form of blood transfusion is done. if for any reason the individual is given a blood that doesn't match with his own immune system, there high possibility of death
A 16 Y/O female was admitted to the pediatric ICU with exacerbation of her cystic fibrosis. On day 3, she was transferred to the medical pediatric unit. The pressure injury survey was conducted on day 4 of hospitalization and the survey team saw a Stage 2 pressure injury under the oxygen tubing over the top of her left ear. Review of her hospital admission assessment record revealed intact, very dry skin with poor turgor. The skin assessment documented on arrival to the medical pediatric unit noted a Stage 1 pressure injury at this site. For the pressure injury survey, this would be reported as:Please make a selection1. A Community Acquired Pressure Injury2. A Hospital Acquired Pressure Injury Only3. A Hospital Acquired and Unit Acquired Pressure Injury
Answer:
A Hospital Acquired and Unit Acquired Pressure Injury
Explanation:
On her hospital admission her skin was reported to be dry and intact with poor tugor, therefore, any pressure areas developed within the hospital stay including the transfer to the unit will then be considered a hospital and unit acquired pressure sore
A Hospital Acquired Pressure Injury Only would then be referring to a new pressure injury that developed after admission to the facility and not necessarily to a specific unit
Imagine a planet that has a similar atmospheric pressure to Earth (760 mmHg) but different concentrations of gases in its atmosphere. On this hypothetical planet, oxygen makes up 10% of the atmosphere, carbon dioxide makes up 15%, and nitrogen makes up the remaining 75%. Based on this information, what is the partial pressure of oxygen on this new planet?
Answer:
"76 mmHg" is the partial pressure of oxygen on this new planet.
Explanation:
Atmospheric pressure on air on earth = 760 mmHg
On an unknown planet :
Oxygen makes up 10% of the atmosphere.
The mole fraction of oxygen gas can be written as [tex]x_1 = \frac{10}{100} = 0.1[/tex]
Carbon dioxide makes up 15% of the atmosphere.
The mole fraction of carbon dioxide gas can be written as [tex]x_2 = \frac{15}{100} = 0.15[/tex]
Nitrogen makes up the remaining 75% of the atmosphere.
The mole fraction of nitrogen gas can be written as [tex]x_3 = \frac{75}{100} =0.75[/tex]
Atmospheric pressure of air on unknown planet,p= 760 mmHg (given)
Partial pressure of gases can be calculated by the help of Dalton's law of partial pressure:
Partial pressure of oxygen gas :
[tex]p_1 = p \times x_1[/tex]
[tex]= 760mmHg \times 0.1\\=76mmHg[/tex]
Partial pressure of carbon dioxide gas :
[tex]p_2 = p \times x_2[/tex]
[tex]= 760mmHg \times 0.15\\= 114mmHg[/tex]
Partial pressure of nitrogen gas :
[tex]p_3 = p \times x_3[/tex]
[tex]= 760mmHg \times 0.75\\=570mmHg[/tex]
"76 mmHg" is the partial pressure of oxygen on this new planet.
One of your brother's friends, Dylan, is unusually short with a stocky build; has a flat face, a large tongue, and an extra fold of skin on his eyelids; and suffers from cognitive deficits, hearing impairments, and a heart defect. Dylan likely has __________.
Answer:
Dylan likely has Down Syndrome / 21 Trisomy Syndrome.
Explanation:
Down Syndrome is a genetic disorder in which the person has an extra copy of chromosome 21, this is why the disorder is known as Trisomy 21. This extra copy changes how the body and the brain develope, which can cause mental and physical problems.
Children with this disorder usually have a low intellectual level, the most frequent cause of identifying mental delay of genetic origin.
Some of the characteristics of these children are slight diminution in the skull size, almond-shaped eyes, a short neck, small ears, a small mouth, a large tongue tends to get out of the mouth, narrow auditive conduct, tiny hands, and feet, weak muscular tone, and they are usually short in height.
There are also some medical problems such as hearing loss, apnea, ear infections, ocular problems, heart defects, intestinal malformations, hypothyroidism, hip dislocation, anemia, among others.
For children with two myopic parents, the likelihood of becoming myopia is _____ correlated with the number of hours spent playing sports each week.
Answer:
The answer is incomplete
Explanation:
However, there is no correlation between parents who have myopia and there children contacting such by playing sports each week regardless of time spent.
Myopia also known as shortsightedness is a condition in which the eyes can see clearly objects that are close but objects that are far appear blurry. Myopia occurs when the shape of the eye causes light rays to bend incorrectly causing images to be formed in front of the retina instead of been formed on it. Myopia is not a sex-linked character unlike colour blindness and is neither a condition that is always passed on to the offspring by parent(s) but there are cases in which parent(s) pass this condition to there offspring(s).
Myopia can however be caused by genetic factors coupled with several environmental factors and life choices like foods eaten, watching of movies in the dark etc.
The___________of the cell is a network of protein filatments and tubules that give support to the cell and may move organelles around inside the cell.
Answer: cytoskeleton
Explanation: the cytoskeleton of a cell is a complex network of protein fibres.it is found within the cell cytoplasm and regarded as the skeleton of the cell.this is because it is responsible for maintaining the shape of the cell , movement of the cell, movement of organelles within the cell and aids movement in Unicellular organisms.
The cytoskeleton is composed of the microfilaments, microtubules and the intermediate filaments.
The microfilaments are thin and flexible filaments composed primarily of actin.it is thin and flexible.the microfilaments allows cell motility,determines the shape of the cell .
The microtubules are hollow tubes composed of protein protofilaments.they allow for movement of water within the cell and it is the backbone of cilia and flagella .they are also involved in the separation of chromosomes during cell division.
The intermediate filaments gives cell tensile strength.
The cytoskeleton is a network of protein filaments and tubules that give support to the cell and facilitate the movement of organelles. It is composed of microfilaments, intermediate filaments, and microtubules.
Explanation:The cytoskeleton of the cell is a network of protein filaments and tubules that give support to the cell and may move organelles around inside the cell. It is composed of three main components: microfilaments, intermediate filaments, and microtubules. Microfilaments are thin filaments made up of the protein actin and provide support and movement, intermediate filaments provide structural support and stability, and microtubules are hollow tubes made up of the protein tubulin and help in cell division and transport.
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The role of central nervous system activity for the experience of pain is best highlighted by:_______.
a) prosopagnosia.
b) phantom limb sensations.
c) frequency theory.
d) perceptual adaptation.
e) the opponent-process theory.
Answer:
b) phantom limb sensations.
Explanation:
This is the experience of sensation and pain from limbs that no longer exist.It is a psychological problem which originated in the brain and spinal cord of Amputees.
The sensations disappeared naturally 2-years later.
The central nervous system's role in the experience of pain is emphasized by phantom limb sensations (Option B), where pain is perceived despite the absence of the limb, due to activity within the brain's neural circuitry. The propagation of signals along axon potentials and their processing in the brain highlights how pain perception can involve central mechanisms.
Explanation:The role of central nervous system activity for the experience of pain is best highlighted by phantom limb sensations. Phantom limb sensations are a phenomenon where individuals who have lost a limb still feel sensations, such as pain as if the limb were still present. This highlights the central nervous system's role in pain perception because the pain is derived not from the peripheral site of the amputated limb, but from the neural circuitry within the central nervous system itself.
Pain is a complex process that starts with nociception at sensory receptors and doesn't become the conscious perception of pain until it is communicated to the brain. Pain signals are transmitted by nociceptive pathways to different areas within the brain such as the thalamus and the somatosensory cortex for final processing. Perception of pain can be delayed due to the time taken for these signals to be propagated along the axon potential and reach the cerebral cortex. Various pathways indicate that pain can emerge even in the absence of actual physical stimuli, as seen in neuropathic pain or as a result of the central nervous system's activity, as is the case in phantom limb sensations.
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Researchers investigated the effect of urea on the three-dimensional structure of a certain enzyme. The researchers dissolved the enzyme in an aqueous buffer solution and added urea to the solution. The enzyme did not appear to have a secondary or tertiary structure. The researchers carefully removed the urea from the solution and determined that the enzyme had the original secondary and tertiary structure again.Based on the results of the experiment, which of the following statements best predicts the effect of urea on the enzyme’s function?1. Function will be disrupted by adding the urea and regained by removing the urea.2. Function will be disrupted by adding the urea, but it will not be regained by removing the urea.3. Function will be gained by adding the urea and disrupted by removing the urea.4. Function will be unaffected by the addition and removal of the urea.
Answer:
Function will be disrupted by adding the urea and regained by removing the urea.
Explanation:
The protein is one of the important biomolecule made of the polymers of the alpha amino acids that are linked together by peptide bonds. The protein works at their specific pH.
Denaturants disrupt the 3 dimensional structure of protein that affect their normal functioning. In the given experiment, the urea acts as denaturant and disrupt the protein structure. The removal of urea will reverse the denaturant condition and protein gain its function.
Thus, the correct answer is option (a).
Answer:
A. Function will be disrupted by adding the urea and regained by removing the urea.
Explanation:
Based on the information, adding the urea denatures the enzyme, which will disrupt the enzyme’s function by disrupting the active site. In contrast, removing the urea causes the enzyme to refold, which will restore the active site and the enzyme’s function.
I also got this question correct so I am sure.
In order to aspirate sample, you would: 1. Press the pushbutton to the second stop 2. Hold the pipetter vertically and immerse the tip into the sample 3. Release the pushbutton slowly and smoothly to aspirate the sample 4. Wait one second and then withdraw the tip from the sample.
True or false?
Answer: FALSE
Explanation: THE FIRST STEP IS INCORRECT AND SHOULD BE
1. press the pushbutton to the first positive stop
THE REST OF THE STEPS ARE CORRECT
The kind of sexual expression where the emphasis is placed on physical pleasure is called ___________________ and is more common in _______________.
Answer:
Body-centered sex
MEN
Explanation:
Sex is defined in various way and portrays different meaning. Some define Sex as always a means of closeness for procreation, or a way of showing love and feeling good(pleasure). To some, it is a sense of duty in fulfilling other partner's wish.
Body-centered sex is a kind of sexual expression where the emphasis is placed on physical pleasure. it focus and draw attention of having sex for pleasure rather than emotion. An old adage once say and i quote "women fall in love with people; men fall in love with genitals." Hence, Body-centered sex is common in MEN
What is the relationship between mutation, the cell cycle, and cancer? Select all statements that apply. A. Mutated genes typically allow cells to respond to checkpoint proteins that hat the cell cycle, thus avoiding formation of tumors. B. As a result of unregulated cells, cells may become cancerous, meaning that the cells grow and divide uncontrollably. C. Cancerous cells may form malignant tumors that invade and destroy surrounding healthy tissue. D. Mutated, defected genes may cause cells to become unable to respond to signals that regulate the cell cycle.
Answer:
B and D
Explanation:
I found B and D to be more of a reasonable answer
B. As a result of unregulated cells, cells may become cancerous, meaning that the cells grow and divide uncontrollably and D. Mutated, defected genes may cause cells to become unable to respond to signals that regulate the cell cycle is the relationship between mutation, the cell cycle, and cancer.
What are human mutations?A genetic mutation is a change in a gene's DNA sequence that results in something different. It permanently alters the DNA sequence of that gene. Genetic differences are necessary for people to develop, which is the process of change across generations. A random genetic mutation arises in a single person.
Depending on their context or location, mutational impacts might be helpful, detrimental, or neutral. The vast majority of non-neutral mutations are harmful. In general, the greater the number of base pairs impacted by a mutation, the greater the effect of the mutation and the greater the risk of the mutation being detrimental.
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You memorize a series of numbers by grouping them into sets of three and thinking of these sets as area codes. This is an example of:
Answer:
The correct answer is chunking.
Explanation:
Chunking is a term signifying the procedure of taking single pieces of information or chunks and aligning them into bigger units. By aligning each piece into a large whole, one can better the amount of data one can remember.
Generally, the most common illustration of chunking takes place in phone numbers. By distinguishing dissimilar single elements into bigger blocks, information becomes easier to recall and retain.
Mariam has just recently gotten pregnant. Before she even found out, her embryo had already formed three germ layers. What is the layer that will develop into the nervous system?
Answer:
Ectoderm
Explanation:
In addition to other structures, ectoderm gives rise to all the nervous tissues. Induction by notochord makes the ectodermal cells to form the neural plate. The elevated ends of the neural plate form the neural folds by the end of the third week of pregnancy. The fusion of neural folds gives rise to the neural tube. Brain and spinal cord develop from the neural tube. Some of the ectodermal cells transform into neural crest cells which in turn give rise to sensory neurons and the postganglionic neurons of the peripheral nerves.
Water is able to maintain the temperature of living organisms, keeping them from freezing or overheating. This is because water has a:____________
Answer:
High specific heat.
Explanation:
Water is able to maintain the temperature of living organisms because it has highest specific heat. Specific heat is a physical property of matter. If specific heat is high then the matter does not get heated easily but once it is heated it does not cool down easily either. In short we can say that water can easily resist temperature changes because it has very high specific heat. This property plays a great role in maintaining the temperature of a living organism's body because all organisms have water in their body. When heat is generated within the body, it is unable to disrupt internal temperature of the organism's body because the water does not get heated easily as a result of which the temperature of the body does not rise. On the other hand, the internal temperature of the body remains the same with slight decrease in the temperature outside because water does not radiate heat easily either. This is how high specific heat of water helps in maintaining a constant temperature in the body of organisms.
Which term indicates an accumulation of crystalline depositions in articular surfaces, bones, soft tissue, and cartilage?
Explanation:
Tophi is a deposition of the mono sodium urate crystals who has high level of uric acid in the blood. This conditions known as hyperuricemia.
Tophi are indication of gout. Most of the people suffering from tophi might have previous attack of arthritis which eventually leads to tophi.
This is really painful and most of the pain occurs in the joints of the body.
One way scientists hope to use the recent knowledge gained about noncoding RNAs lies with the possibilities for their use in medicine. Of the following scenarios for future research, which would you expect to gain most from RNAs? A) exploring a way to turn on the expression of pseudogenes B) targeting siRNAs to disable the expression of an allele associated with autosomal recessive disease C) targeting siRNAs to disable the expression of an allele associated with autosomal dominant disease D) creating knock-out organisms that can be useful for pharmaceutical drug design E) looking for a way to prevent viral DNA from causing infection in humans
Answer:
C) targeting siRNAs to disable the expression of an allele associated with autosomal dominant disease
Explanation:
siRNAs are the small interfering RNAs that do not serve as a template during the process of protein synthesis. These RNA molecules are double-stranded and have about 23 nucleotides in total. siRNAs control the expression of genes that selectively inhibiting the mRNAs. They control gene expression at the post-transcriptional level by selectively cleaving mRNA molecules that have the nucleotide sequences complementary to the siRNA.
The siRNA molecules can be used to selectively inhibit the expression of the allele for an autosomal dominant disorder. This selective inactivation of the allele associated with the disease would help to control the corresponding genetic disorder.
Anaphylactic shock is an immediate allergic response. Why is anaphylactic shock a medical emergency?
Answer:
Severe allergic response causes fluid loss from the blood, breathing difficulty and therefore, is life threatening.
Explanation:
The anaphylactic shock results from the type I allergic reactions during which the presence of an allergen triggers a severe response. It occurs since IgE antibodies are already present in the body. There is a release of histamine and other vasodilators. Vasodilation and increased permeability of the blood capillaries result in the loss of fluid from the blood. Constriction of airways of the lungs causes difficulty in breathing and weakens the heartbeat. Therefore, severe fluid loss from blood and constricted airways make it life-threatening.
Answer:
You will lose blood, and not be able to lead, which could result in death.
In _______ balance, the two sides of a composition on either side of an imaginary vertical dividing line correspond to one another in size, shape, and placement of form.Selected Answer:a. symmetrica lCorrect Answer:a. symmetrical
Answer:
Symmetrical balance.
Explanation: Anatomically, equal distribution of body organs and parts within an organisms to give proportions of shapes, sizes, and forms of the divided sides or halves is called body symmetry
Asymmetrical balance has two sides with each side's size, shape and placement form different from one another, (not match) but yet well balanced.
Therefore the correct option is Symmetrical balance, just like mirror image in which the two side are exactly matched and balanced.
Therefore, if an imaginary line is vertically drawn through the center of composition of the object then the forms on each side of the axis produced should be proportionate to one another in size, shape and placement.They may be view as mirror image of one another but not with 100% perfect similarity.
In ideal cases to get a perfect symmetrically balanced composition, centering is the method usually used.However, most center design may produce flat shape which may be not give good symmetry.
Imagine you are a geneticist interested in studying a newly discovered species of very colorful birds. You have found that a single gene is responsible for their beautiful colors and that yellow birds are homozygous for the yellow allele, green birds are homozygous for the green allele and blue birds are heterozygous for these alleles. You focused your efforts on studying one specific population and counted 9% yellow, 49% green and 42% blue birds. What are the allele frequencies in this population?
a) yellow = 0.09, green = 0.49
b) yellow = 0.9, green = 4.9
c) yellow = 0.3, green = 0.7
d) yellow = 0.5, green = 0.5
e) proportion of alleles cannot be determined because the population is evolving
Answer:
C
Explanation:
Yellow = YY = 9% = 0.09
Green = YG = 49% = 0.49
Blue = GG = 42% = 0.42
______________________________________________________
[tex]Frequency of yellow allele = YY + \frac{YG}{2}[/tex]
(because half of the YG (blue) genotype comes from the Y allele)
Therefore frequency of Y = 0.09 + (0.49/2)
Y = 0.09 + 0.245
Y = 0.335
Yellow = 0.3
______________________________________________________
[tex]Frequency of green allele = GG+ \frac{YG}{2}[/tex]
(because the other half of the YG (blue) genotype comes from the G allele)
Therefore frequency of G = 0.09 + (0.49/2)
G = 0.49 + 0.245
G = 0.335
Green= 0.7
Therefore, the answer is C
c) yellow = 0.3, green = 0.7
The calculation is as follows:
The frequency of Y = 0.09 + (50% of 0.49)
Y = 0.09 + 0.245
Y = 0.335
Yellow = 0.3
And,
The frequency of G = 0.09 + (50% of 0.49)
G = 0.49 + 0.245
G = 0.335
Green= 0.7
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When Avery and his colleagues had obtained the transforming factor from the IIIS virulent cells, they treated the fraction with proteases, ribonuclease, and deoxyribonuclease, followed by the assay for retention or loss of transforming ability.
What was the purpose of these experiments?
Answer:
to find out the exact molecular species of the transforming principle
Explanation:
As demonstrated by Avery and his colleagues, their aim and purpose is to find out an determine the exact molecular species of the transforming principle.
In the quest to find out, they obtained IIIS virulent cells and treated the fraction with proteases, ribonuclease and deoxyribonulease.
The purpose of these treatment was to hydrolyze peptide bonds of proteins, cleave RNA and catalyzes the hydrolytic cleavage of phosphodiester linkages in the DNA backbone of the virus cell, thus degrading the DNA in the virus cell respectively.
This process was followed by assay for retention or loss of transforming ability. We can see that it is glaring that the purpose of these experiment was to find out the exact molecular species of the transforming principle.