in an investigation to determine a factor that affects the growth of rats a student exposed 100 rats of the same age and species to identical conditions except for the amount of living space and the amount food each rat received. Each day the student measured and recorded the weight of each rat. State one major error that student made in performing this investigation.
Answers
Answer:
he amount of living space for the rats and the amount of food are two different variable that will make a mistake the student changed. If you're doing an experiment, you need to control the conditions and the only change ONE variable at a time of each one . If you want to know if the food and the living space affect weight, you should do two different experiments.
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In the described investigation, two major errors are the lack of control group and altering two variables simultaneously. A control group is essential for comparing results, while keeping all but one variable constant helps in asserting a cause-effect relationship.
Explanation:A major error in this investigation is the lack of control group. A control group is a group of subjects that are kept under normal conditions and not exposed to the experimental variable, in this case, changes in living space and food amounts. Without a control group, it’s difficult to determine whether changes in the rats' weight are due to the manipulated variables or to some other, uncontrolled factors.
Another potential error is the simultaneous manipulation of two variables - living space and food amount. Scientific investigations typically require a single variable to be altered at a time while keeping all others constant. This helps to assert a cause-effect relationship between the one changing variable and the observed effect. If two variables are altered simultaneously, it cannot be definitively concluded which one is causing the change in the rats' weight.
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Related Questions
Which of the following is true about the age of rock layers and the age of the Earth?
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Answer:
Likewise, scientists use radiometric dating to determine the ages of moon rocks, obtained by astronauts. Taken together, these methods give results that suggest an age for our Earth, meteorites, the moon – and by inference our entire solar system – of 4.5 to 4.6 billion years old.
Explanation:
Answer:
The Earth is older than any rock layer.
Explanation:
Answered it correctly on Study Island C:
Please Help... i been sitting here trying to figure this out.
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Answer:
A
Explanation:
Answer:
I believe the answer is A.
Explanation:
Hope this helps!
if cells were placed in a solution, and you observed them shrinking, the solution is probably _____
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It is a hypertonic solution:)
Answer:
Hypertonic solution.
Explanation:
if cells were placed in a solution, and you observed them shrinking, the solution is probably a hypertonic solution.
Hypertonic solution refers to a solution that has a greater concentration of solutes on the outer membrane as compared to the inside of the cell.
Number 1 please zzzzzzzzzzzzzzzzzzzzzzz
Answers
Answer:
By osmosis, and osmosis is passive transport.
Explanation:
In a cell, water always enters by the process of osmosis no matters the wall is hydrophobic, hyrophillic, semi - permeable.
Hope this helps you frnd
Answer:water enters the cell by osmosis
Explanation:
Water enters the cell by the method of osmosis which is the flow of water through a semi permeable membrane from higher concentration to lower concentration. It is basically passive transport.water crosses the cell membrane of the cell consists of a phospholipid bilayer which consists of a hydrophobic (outer or facing the environment) end and a hydrophilic (facing the inner side of cell )end ,so water crosses this membrane which is semi permeable and enters the cell.
Which of the following is NOT a form of energy?
Heat
Electricity
Light
None of the Above
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Answer:
None of the above
How are Binary Fission and mitosis similar?
A. Both processes are used to create egg and sperm cells.
B. The stages in both processes are identical.
C. The resulting daughter cells in both processes are genetically unique.
D. Both processes produce genetically identical daughter cells.
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Answer:
D
Explanation:
3. Which of the following processes removes oxygen from the atmosphere?
A. condensation
B. photosynthesis
C. respiration
D. transpiration
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Answer:
C. Respiration.
Explanation:
To respirate means to breath and breathing takes oxygen out of the atmousphere. And it was the only one that made sence.
Answer: C. respiration
Explanation: the process of decay and respiration removes the oxygen from the air/ atmosphere.
which condition would most likely result in evolution
A. a single individual dies in a large population
B. a butterfly predator sees yellow more easily than it does green, and a population of butterflies includes both phenotypes.
C. a green parrot has an allele for green feathers and an allele for blue feathers.
D. a large population continues to grow
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C. a green parrot has an allele for green feathers and an allele for blue feathers.
Answer:
B. a butterfly predator sees yellow more easily than it does green, and a population of butterflies includes both phenotypes.
Explanation:
The butterfly population is said to have a genetic variation in the form of yellow and green alleles. The green butterflies have a survival advantage over yellow ones as the former one are less visible to the predator.
The selective advantage of green allele over yellow allele would result in the natural selection of green allele. The green butterflies will reproduce more and would leave more progeny in the population.
Gradually, the population would consist of green butterflies only, that is, the evolution of the population of butterflies having green allele only.
organisms use nitrogen in which one of the following ways?
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Final answer:
Organisms use nitrogen in different ways, such as through nitrogen fixation by bacteria for plants and by consuming nitrogen-containing compounds for heterotrophs. Legumes have a symbiotic relationship with nitrogen-fixing bacteria, which contributes to their nitrogen acquisition.
Explanation:
Living organisms use nitrogen in several ways:
Plants: Plants acquire nitrogen as nitrate or ammonia dissolved in water. Nitrogen fixation is the primary source of nitrogen used by plants in most ecosystems.
Heterotrophs: Nitrogen is obtained from the food they eat, primarily from proteins, nucleic acids, and nucleotides.
Legumes: Legumes have a symbiotic relationship with certain nitrogen-fixing bacteria known as rhizobia. These bacteria fix free nitrogen, release it in the form of ammonia, which combines with carbon compounds in the plant cells to produce amino acids.
Organisms must be able to adapt to a changing external and internal environment. An organism's ability to maintain a stable internal environment is known as homeostasis. How does a cell's membrane help an organism maintain homeostasis?
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Answer:
Cell membranes control the substances that enter or leave cells.
Explanation:
Without a cell membrane the organism will be unprotected and the homeostasis will die.
A liver cell requires energy to move vitamins from an area of low concentration,across the cell membrane,to an area of high concentration. This process used by the liver cell is called
Answers
Answer:
Active Transport
Explanation:
Active transport is the process of transport of substances from region of their lower to that of higher concentration. Since the transport occurs against the concentration gradient, it is energy requiring process and needs input of energy to occur.
In given example, liver cells transports vitamins against the concentration gradient in energy dependent manner. Therefore, it is an example of "active transport".
(Will mark brainliest, direct answer is preferred)
Which sequence shows the correct path of blood flow between the heart and lungs?
right ventricle, lungs, left atrium
right atrium, lungs, right ventricle
left atrium, lungs, left ventricle
left ventricle, lungs, right atrium
Answers
Answer:
Right ventricle, lungs, left atrium
Explanation:
The pathway of blood in the heart and lungs follows this order:
The body -> Superior and inferior vena cava -> Right atrium -> tricuspid valve-> right ventricle-> pulmonary semilunar valve -> pulmonary artery -> lungs-> pulmonary vein -> left atrium-> bicuspid valve -> left ventricle- aortic valve-> Aorta-> the body
So not counting the valves and the vessels, the best answer would be the first option.
It would also be good to remember that unoxygenated blood starts in the right side of the heart and the oxygenated blood starts in the left side of the heart.
Ventricles pump blood and atria receives blood. The right atrium receives blood from the lungs, while the left atrium receives blood from the body. The left ventricle pumps blood towards the body, while the right ventricle pumps blood towards the lungs.
For numbers 1 to 10, if a cell has a diploid number of 24, how many of the structures will be present at each stage indicated?
CHOICES: A). 0 B). 12 C). 24 D). 48
1. Centromeres at Anaphase
2. Chromosomes at Prophase 1
3. Chromatids at Telophase
4. Centromeres at Metaphase 1
5. Chromosomes at the end of Telophase 1
6. Chromatids at Anaphase 2
7. Chromosomes at Metaphase 2
8. Chromosomes in organism's sperm cell
9. Centromeres at Anaphase 1
10. Chromatids at Anaphase
Answers
Final answer:
For a diploid number of 24, the number of structures present at each stage indicated varies from 0 to 48.
Explanation:
For a cell with a diploid number of 24, the number of structures present at each stage indicated are as follows:
Centromeres at Anaphase: There will be 0 centromeres.
Chromosomes at Prophase 1: There will be 24 chromosomes.
Chromatids at Telophase: There will be 48 chromatids.
Centromeres at Metaphase 1: There will be 24 centromeres.
Chromosomes at the end of Telophase 1: There will be 48 chromosomes.
Chromatids at Anaphase 2: There will be 48 chromatids.
Chromosomes at Metaphase 2: There will be 24 chromosomes.
Chromosomes in organism's sperm cell: There will be 24 chromosomes.
Centromeres at Anaphase 1: There will be 24 centromeres.
Chromatids at Anaphase: There will be 48 chromatids.
Option A)0 is the correct answer for: 1.Centromeres at Anaphase,
Option B)12 is the correct answer for: 5.Chromosomes at the end of Telophase, 7.Chromosomes at Metaphase2, 8.Chromosomes in organism's sperm cell
Option C)24 is the correct answer for 2.Chromosomes at Prophase , 3.Chromatids at Telophase, 4.Centromeres at Metaphase , 6. Chromatids at Anaphase, 9.Centromeres at Anaphase
Option D)48 is the correct answer for 10.Chromatids at Anaphase
Centromeres at Anaphase:) 0.During anaphase, the sister chromatids are separated, each chromatid becomes an individual chromosome, so there are 0 centromeres.Chromosomes at Prophase 1: C)24.
In prophase 1 of meiosis, homologous chromosomes pair up, so the diploid number of chromosomes, 24, is maintained.Chromatids at Telophase: C)24.
During telophase of mitosis, chromatids have already separated, and there are 24 chromatids because the original 24 chromatids separated to form 24 new chromatids.Centromeres at Metaphase 1: C)24.
In metaphase 1 of meiosis, homologous chromosomes align at the metaphase plate, each consisting of two sister chromatids, keeping the centromere count at 24.Chromosomes at the end of Telophase 1: B)12.
Telophase 1 ends with two haploid cells, each having 12 chromosomes (half of the original diploid number).Chromatids at Anaphase 2: C)24.
During anaphase 2, sister chromatids are separated, resulting in a total of 24 chromatids.Chromosomes at Metaphase 2: B)12.
Metaphase 2 of meiosis involves 12 chromosomes aligning at the metaphase plate in each of the two haploid cells.Chromosomes in organism's sperm cell: B)12.
Sperm cells are haploid, containing half of the diploid number, which means 12 chromosomes.Centromeres at Anaphase 1: C)24.
In anaphase 1, homologous chromosomes separate, but each still consists of two sister chromatids, leading to 24 centromeres.Chromatids at Anaphase: D)48.
Anaphase of mitosis involves the separation of 24 pairs of chromatids, totaling 48 chromatids.
Plants are divided into two categories, non-vascular and vascular. Describe the advantages of vascular tissue (xylem and phloem) in that category of plants.
Use more than 4 sentences, answer in complete sentences, And do not copy and paste from different websites. This is worth
35 points!!! Do not disappoint me.
THANK YOU GUYS!!
Answers
Answer:
Below are some of the advantages of vascular tissues.
Explanation:
Vascular tissues help plants to survive in non humid environments, this is through their transport quality which is used to transport water from the ground to the plant.Vascular tissues help in transporting nutrients to all parts of the plant compared to the non-vascular plants.Vascular plants can survive in an array of environments considering their automated transport system.Vascular tissues also have an advantage of providing stronger support to plants.describe the sex and characteristics of the person labeled A
Answers
The person labeled A is a male who has the particular disease stated in the question.
Answer: Person labeled as A is male, who is affected with disease.
Explanation: The diagram showing in image is pedigree chart. Pedigree chart is the diagrammatical representation of family information. In which round shape symbol is for female and square shape symbol is for male. In the chart if symbols are colored it shows that the person is affected with disease.
Someone help me pls!! There is a picture and I will mark a brainliest! :)
Answers
Answer:
I sends messages along the spinal cord
Explanation:
B) sends messages along the spinal cords
Why does age group 45-49 have the largest population?
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What does the problem says
It isn’t ages 20-24 because male is 11.9/female is 10.77
And for ages 45-49 is ... (male: 10.39 and female: 10.59)
Hope this help and if this did please (brainliest and thanks) :] hope you have a good day/ hope you had a good day!!
transmit impulses from other neurons to the cell body while transmit impulses away from the cell body.
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Answer:
Dendrites transmit impulses from other neurons to the cell body while axons transmit impulses away from the cell body. Dendrites transmit impulses from other neurons to the cell body while axons transmit impulses away from the cell body.
Hope i'm right lol
The main goal of cellular respiration is the production of molecules.? A) ADP
B)ATP.
C)glucose
Answers
The answer is B)ATP.
Answer:
ATP
Explanation:
Which statement describes plant like protists ?
A- plant like protists are all green.
B- plant like protists are all unicellular.
C- plant like protists are all eukaryotes.
D- plant like protists are all heterotrophic.
Answers
Answer:
C-plant like protist are all eukaryotic
Explanation:
Hope it helped!
Plant-like protists are all eukaryotes. They are called algae and include both unicellular and multicellular organisms. These protists perform photosynthesis and contain chlorophyll but are not exclusively green or heterotrophic. Option C is correct.
Plant-like protists are called algae and include a diverse group of organisms such as single-celled diatoms and multicellular seaweeds. They are all eukaryotes, meaning they have a defined nucleus. These protists contain chlorophyll and perform photosynthesis, similar to plants, but they do not fit all the criteria to be classified as plants.While some plant-like protists are green due to chlorophyll, not all of them are exclusively green, and they can also be unicellular (like diatoms) or multicellular (like seaweeds). Additionally, plant-like protists are generally autotrophic, making their own food through photosynthesis, unlike heterotrophs that acquire food from external sources.Mafic lava tends to have low silica content. Based on this, which of the following statements about mafic lava is most likely true?
A. It contains fewer volatile gases.
B. It has higher viscosity.
C. It flows slowly.
D. It contains more volatile gases.
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Answer:
A. It contains fewer volatile gases.
Explanation:
Mafic lava have a composition of about 45-55% silica with high amount of Fe, Mg, Ca.
The silica content is quite low compared to those of granitic magma whose silica content can reach up to about 60%.
What determines the viscosity of magma is basically the silica content of the magma and the temperature of the magma. Viscosity is the resistance to flow.
The higher the silica content, the lower the viscosity and the higher the amount of volatile gases. Such type of magma is the granitic magma. Granitic magma due to their viscosity flows slowly.
The lower the silica content, the higher the viscosity and the lesser the presence of volatile gases in them. Such an example is Mafic magma. Mafic magma flows very slowly with low amount of dissolved gases.
Answer:
A. It contains fewer volatile gases
Explanation:
The mafic lava is a lava type that has low viscosity. The reason for that is its composition, being very rich in magnesium and iron. Because this type of lava is low in viscosity, it is unable to contain the majority of the gases and water in it, as they find it relatively easy to ''escape'' from it. That results in much calmer eruptions of the volcanoes that produce mafic magma, with explosions almost never occurring, and even if they do they are very small.
When rock is weathered and transported downstream, this is best seen as an
example of the conservation of
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Answer:
Matter
Explanation:
Matter
Answer:
matter
Explanation:
Matter can neither be created nor destroyed. When a rock is weathered, even though it is broken into smaller particles, they all still exist . If these particles, no matter how minuscule, are combined again they would lead to the formation of same rock. Hence conservation of matter is followed here since rock is a type of matter.
How can you determine that a star is about to turn into a red giant?
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Answer:
it lacks fuel (hydrogen) it burns helium
Explanation:
Stars that are in a late cycle, will enter another stage known as Red Giants. The red giant will be tremendously brighter.
This happens since, helium sustitues the hydrogen that before was burning for millions of years. The red giant will grow bigger and bigger to enter the next stage shown in the image. See below :)
“Green Power” clean energy production refers to all of the following new power resources except for
Wind generators
Geothermal energy
Solar energy panels
Nuclear fusion
Answers
Answer: Nuclear fusion
Explanation:
Green power can be define as the generation of thermal and electrical energy by utilizing the renewable sources. This form of power produce minimum or low pollution hence, cause no or less harm to the environment.
Nuclear fusion is the process that occurs in the thermal power plant in which atoms with high atomic mass are fused to liberate thermal energy and nuclear radiations. The radiations are harmful and mutagenic. These radiations and thermal energy includes greenhouse gases which are likely to pollute the air.
On the basis of the above explanation, nuclear fusion is the correct option.
William is testing what type of light best helps bean plants grow. He plants four beans in four separate pots. He places each pot in a different room and subjects them to different types of light, and he waters each plant the same amount. He uses sunlight, ultraviolet, fluorescent, and black light. William then measures the height and growth rate of each plant. Which light source is part of the control group for William’s experiment? A) sunlight B) ultraviolet C) fluorescent D) black light
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Answer:
A) Sunlight is the correct answer
Explanation:
Answer: The answer is A. Sunlight
Explanation: I know because i had the same question.
An ocean food chain is shown. Which organism is a tertiary consumer? a.clownfish b.brittle star c.killer whale d.octopus
please help me I'm confused!!!!
Answers
The answer is C. Killer Whale. A tertiary consumer eats secondary consumers and is usually a carnivore, though some can and will eat plants.
Which feature is characteristic of rivers?
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Answer:
Hello :))
Explanation:
The answer you would be looking for would be B.) A weak or strong current.
Hope this helps! :))
The feature is characteristic of rivers are, A feature of strong or a weak current. The river is short and rushes fast. Some elements in this section of the river are V-shaped valleys, interlocking stimuli, etc.
What is the river?A river is a body of water that flows downhill from the force of gravity.
A river can be broad and in-depth, or narrow enough for someone to wade across.
Thus, option "B" is correct. A feature of strong or a weak current.
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If a scientist unknowingly breaks the law, he is guilty of
noncompliance
scientific fraud
an honest mistake
obias
MTVT AUTOTAM
Answers
Final answer:
If a scientist unknowingly breaks the law, they are guilty of noncompliance, which is different from scientific fraud, which is intentional. Unintentional breaches of legal or ethical standards in research are still serious and can have significant consequences. Understanding the intent and nature of the violation is critical in the context of scientific integrity.
Explanation:
When a scientist unknowingly breaks the law, they are guilty of noncompliance, not necessarily scientific fraud or an honest mistake. Scientific fraud involves intentional wrongdoing, such as fabricating data, altering data sets, or misreporting experimental subjects, which contribute to the publication of false scientific information. An honest mistake in science could be due to human error or a misinterpretation of data, without the intent to deceive. It is important to distinguish between intentional and unintentional acts when considering the conduct of researchers and the ethical implications of their actions. While science must be open to new theories and methods, all experiments need to adhere to established legal and ethical standards to maintain scientific integrity and trust.
Violations of ethics in research can take various forms, including plagiarism, cheating, or misrepresentation of facts, and such misconduct can lead to penalties within the scientific community or even legal action, depending on the severity of the offense. It is incumbent upon the scientific community to uphold the principles of rigorous research to prevent noncompliance and protect the validity of scientific discovery. When assessing whether an action is a crime, it's essential to consider both the act itself and the intent behind it. In the context of law and ethics in science, ignoring protocol or legal guidelines—even unintentionally—can have severe repercussions.
_______ power can be harnessed in the ocean to create power.
Chemical
Wave
Nuclear
Solar
Answers
Wave my guy the answer would be wave. Doctor Phil btw nice too meet you
True or false: the average virus is quite large when compared with cells true or false
Answers
Answer:
The answer is false viruses are 1/10th the size of cells
Explanation:
The answer would be False