Which statements are true?
Hurricanes can be caused by physical processes in the hydrosphere.
Most of the earth's freshwater can be found in the air and streams.
Most plants and animals need freshwater to survive.
Ocean currents move warm water from the equator toward the poles.
The water cycle is powered by the sun.
Answer:
The correct answer is - 1), 3), 4) and 5) are correct statements.
Explanation:
Hurricanes are the tropical storm caused in tropical or sub tropical water bodies. Hurricanes are tropic cyclone caused where warm air rises from ocean water and replaced by the cooler are and then again with warm air and cooler in rapid manner.
Most plants and animals need fresh water for their survival because body comprises water to perform several reaction and prevent from dehydration.
Ocean currents move warm water to the poles from the equator due to regulation of the global water temperature. Thus is maintained by the m,mechanism of the convection current that carries the warm water from the equator to the poles and at the poles, these warm warm because of the lowering temperature, cools an sinks.
The water cycle is the process in which water circulates within the spheres and begins with evaporation by sun.
Thus, the correct answer is - 1), 3), 4) and 5) are correct statements.
Which soil is the stickiest?
A.
clay
B.
loam
C.
silt
D.
sand
What must happen before a chemical reaction can begin?
Answer:
The correct answer is that the activation energy must be reached.
Explanation:
In order to start a chemical reaction, energy is needed. A certain amount of energy is needed in order to get started. This energy is termed as activation energy. A reaction would not take place unless the molecules or atoms of reactants come together. This takes place only when the particles are in motion, and for motion, energy is required.
The reactants have to overcome forces, which push them away from each other, and the bonds present in the reactants are needed to get dissociated, for both these purpose energy is required. Thus, before the beginning of a chemical reaction, the activation energy must be reached.
what process is shown? A. endocytosis B. phagocytosis C. pinocytosis D. exocytosis
Endocyotosis was incorrect.
Answer:
D. exocytosis
Jane waters her plants every morning. Which path does the water take to be a part of photosynthesis?
roots to leaves
leaves to roots
stems to roots
Grazing cows disturb the grass and cause insects to fly around the cows as they eat. In turn, birds swoop in and eat the insects. This type of feeding relationship is an example of A) commensalism. B) mutualism. C) parasitism. D) predation.
___________ is the attraction of water molecules to one another, while _________ is the attraction of water molecules to other polar substances.a: adhesion; cohesionb: cohesion; adhesionc: crossed outd: surface tension; adhesion
Correct answer: B). Cohesion; adhesion
Cohesion is defined as the force of attraction between the same substances while that of adhesion is defined as the force of attraction between the different type of substances.
Cohesion is the force that is known to hold the hydrogen bond together in order to create surface tension of water molecules. While that of adhesive force is responsible for pulling the water molecules towards the other molecules.
Hence, the correct answer would be ''Cohesion; adhesion''
In DNA molecules nucleotides bond together according to the nitrogenous bases. Which of the following correctly describes how nitrogenous bases bond together?
A). Purines bond to other purines
B). Purines bond to pyrimidines
C). Purines and pyrimidines can bond with themselves and each other
D). Pyrimidines bond to pyrimidines
Final answer:
OPTION B.
In DNA, purines (adenine and guanine) bond to pyrimidines (cytosine and thymine), which maintain the uniform structure of the DNA double helix.
Explanation:
In DNA molecules, nucleotides bond together according to the nitrogenous bases. The correct description of how nitrogenous bases bond together is that purines bond to pyrimidines. This means that the two purines, adenine (A) and guanine (G), with a double-ring structure, will bond with the pyrimidines, cytosine (C) and thymine (T), which have a single-ring structure. Specifically, adenine pairs with thymine, and cytosine pairs with guanine. This bonding maintains the uniform shape of the DNA double helix by keeping the distance between the two DNA chains constant.
What is the main function of carbohydrates
The main function of carbohydrates is to provide energy to the body, particularly through a simple sugar called glucose. They also serve as energy storage molecules and play a significant role in forming certain structural components, like the cell walls of plants.
Explanation:The main function of carbohydrates is as a source of energy for the body. Carbohydrates, a type of macromolecule, are an essential part of our diet, with natural sources being grains, fruits, and vegetables. These sources provide energy through glucose, a simple sugar that is a component of starch and a common ingredient in many staple foods. In addition to providing energy, carbohydrates serve other important functions in humans, animals, and plants. For instance, certain types of carbohydrates such as disaccharides, starch, and glycogen also serve as energy storage molecules. Moreover, carbohydrates play a vital role in certain structures, such as the cell walls in plants.
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When evaluating the difference between baked potatoes and French fries, the two areas most different are: Calories and cholesterol Calories and sodium Protein and carbohydrates Protein and sodium
Deer need food and water to survive. What are food and water for the deer population?
A. Carrying capacity
B. Limiting factor
C. Population growth
D. Scarce resources
Answer:
B. Limiting factor
Explanation:
Meiosis is used to make sperm and eggs. Why did the splitting process have to happen twice?
which of the following does not show the law of conservation of mass?
A. 24g of Mg burn in 32g O2 to produce 56g of MgO
B. 24mL of Mg burn in 32mL O2 to produce 56mL of MgO
C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO
D. 1 atom of Mg reacts with 1 atom of O to produce a unit of MgO that contains 2 atoms
Answer:1. B
2. D
,3. A
4. B
5. A
6. B
7. D
8. B
9. B
10. A
11. D
12. B
13. D
14. C
15. B
Explanation:
Grass → Rabbit → Weasel → Fox → Fungi Which population would most likely increase if the weasel was removed from the food chain?
Answer:
The rabbit population would increase.
Explanation:
The weasel is the rabbit's predator in the food chain shown in the question above. If the weasels disappeared from the environment, the rabbits would be left without predators, which would allow the population of rabbits to grow, since the collections would die only from natural causes and not from predatorism. Thus, the rabbits' birth rate would be higher than the mortality rate, causing the population to grow.
Large quantities of proteins modified by the Golgi apparatus exit the cell through the process of
The answer is; exocytosis
The secretory vesicles that pinch off from the Golgi apparatus move across the cytoplasm to the cell membrane. The bilipid layer of the vesicle fuses with that of the cell membrane and the contents in the vesicle are expelled to the outside of the cell. Exocytosis is especially significant in excretory cells such as those that produce mucus in the buccal cavity.
"The diagram shows the inside of a eukaryotic cell.
Which process occurs in the structures that are labeled X?
lactic acid fermentation
alcohol fermentation
glycolysis
Krebs cycle"
What is the main purpose of the organ system shown above?
A)
receives stimuli, integrates information, and directs the body
B)
transports nutrients, gases, hormones, and wastes through the body
C)
provides support for the body and protects delicate internal organs
D)
provides mobility and controls the movement of materials through some organs
Answer:
The most appropriate answer would be C) provides support for the body and protects delicate internal organs.
The skeletal system consists of bone, ligaments, cartilages and other tissues.
The main functions of a skeletal system in a human being are:
Support: It provides the framework and support to the body which helps in maintaining the shape of the body. For example, lungs would have collapsed in absence of rib cage and associated muscles. Movement: It helps in movement and locomotion of the body. Protection: It protects the internal organs of the body. For example, the skull protects the brain, vertebrate protects the spinal cord et cetera. Blood cell production: Haematopoiesis mainly occurs in the bone marrow. Storage: It can store minerals like iron and calcium. Endocrine regulation: Osteocalcin released from bone cells contributes to the blood sugar (glucose) regulation and fat deposition.All of the following lists include sources of point-source pollution EXCEPT :
A) oil spills , irrigation , fertilizers , pesticides
B) pesticides , oil spills , irrigation , leaky underground storage tanks
C) drainage from industrial plants , oil spills , runoff from street gutters , chemical spills
D) pesticides , herbicides , animal waste , irrigation
Point source pollution defines a source from which pollutant is discharged, hence option d is correct.
What is point-source pollution?Factories, industrial facilities, oil refineries, pulp, and paper mills, chemical manufacturers, automobile manufacturers, and food processors.
Point source pollution is described as any single identified source of pollution from which pollutants are released, shipped, or manufactured chimneys by Sewage Treatment Plants.
Point sources include, among other things, factories and sewage treatment facilities. Pollutants include heavy metals, noxious chemicals, thermal pollution, petroleum, and medicines.
Therefore any single identified source of pollution is a point source except option d.
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Why does hypnosis affect the brain?
Usually, a hypnotized person forgets to blink, giving the impression of being out of breath. However, the subject is in a hyperactive mental state, activating areas of the brain that normally do not show as much activity. One less.
When an individual is hypnotized, there is a region of the brain that has its activity reduced, precisely the one related to the spatial perception and that we have of ourselves, in addition to our episodic memory. This causes the hypnotized person to concentrate intensely on something created by their own imagination - or that has been suggested - but not as part of what is being imagined. Hypnotized people lose the ability to remember what they would normally do in certain situations, while the ability to think about a variety of imaginary options increases.
This explains why people in a hypnotic state end up behaving completely differently from normal, remaining calm in situations in which they would feel terrified, for example.
A) Chromosome B) DNA nucleotide C) Codon D) Gene Place the components in order, from smallest to largest. A) A-B-D-C B) B-C-D-A C) C-D-B-A D) D-C-B-A
Answer: The correct answer is- B) B-C-D-A that is DNA nucleotide- Codon- Gene- Chromosome.
DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms. It is made up of small units called nucleotide ( which contains deoxyribose sugar, phosphate, and nitrogenous base).
A sequence of three nucleotide is called codon ( which codes for a particular amino acid).
Different codons are present in a gene, which is a segment of DNA coding for a particular protein.
Finally, genes are present on chromosome ( thread like structure composed of DNA).
Thus, option B) correctly depicts the given components in order, from smallest to largest.
A cell is placed in a solution containing a higher solute concentration than the interior of the cell. What effect would this have on the cell?
a. The cell would divide.
b. The cell would rupture.
c. The cell would shrivel.
d. The cell would swell.
A cell in a hypertonic solution, which has a higher solute concentration outside than inside, will lose water and shrivel as a result of osmosis.
Explanation:When a cell is placed in a solution that has a higher solute concentration than the interior of the cell, it is in a hypertonic solution. In this scenario, the cell will lose water to the surrounding environment because water moves from areas of lower solute concentration to areas of higher solute concentration, a process known as osmosis. Consequently, the cell will shrivel as it loses water.
Thus, the correct answer to what effect a hypertonic solution would have on a cell is:
c. The cell would shrivel.This is because the hypertonic solution has a higher concentration of solutes compared to the cell’s interior, causing water to exit the cell to try to balance the solute concentrations, resulting in the cell shrinking or crenating.
When astronauts brought back rock samples from the Moon, the minerals present were mostly the same as those found on Earth. Can you think of reasons why this might be so? Would you expect minerals on Mars or Venus to be the same, or at least very similar, to those on Earth?
The minerals present in moon rock samples are mostly the same as those found on Earth because the Moon and Earth share a common history, believed to have been formed out of the debris from a massive collision with Earth around 4.5 billion years ago. For this reason, we can expect some similarities in mineral composition. For Mars and Venus, similarities to Earth's minerals may exist, but there could also be significant differences due to the unique geological history and environmental conditions of each planet.
The mineral compositions of celestial bodies are determined by their formation processes and the conditions they have been subjected to over time. The reason the Moon's minerals are similar to Earth's is that it likely originated from Earth's material. This common origin would naturally lead to similar minerals forming on both bodies. Mars and Venus, however, formed independently and have different environmental conditions and geological histories. Mars, for example, has a different atmosphere and has been exposed to different conditions than Earth, which would influence its mineralogy. Similarly, Venus's extreme temperatures and atmospheric pressure would also likely result in a different set of minerals. Nevertheless, all rocky planets in our solar system formed from the same protoplanetary disk, which means there are certainly materials and minerals that they have in common.
What connects the axon of one neuron with the dendrite of another neuron to replay messages?
Which scientist conducted the first psychological experiment?
Acupuncture is an alternative medicine that uses wire-thin needles inserted by a trained practitioner into specific points in the body. This ancient form of pain relief and stimulation is said to benefit patients by blocking channels which practitioners claim allow pain to travel within the body. This practice became more widely recognized and used after a New York Times reporter wrote in 1971 of a positive experience with it after surgery.
Those who doubt the effectiveness of this treatment for pain attribute the pain relief to a placebo effect: if a patient believes something will reduce their pain, they will experience some relief. The National Institutes of Health says that acupuncture relieves pain and reduces nausea and vomiting, although it is unclear how it works. The few adverse effects reported are due to improperly sterilized needles or improper delivery, making this still a fairly low risk option. For anyone considering acupuncture, they should first research its effectiveness for their specific condition.
Summary of statements published by the National Institutes of Health
Which statement best explains the scientific claim about how acupuncture treatment reduces pain?
a) Acupuncture is an alternative medicine that uses wire-thin needles inserted by a trained practitioner into specific points in the body.
b) Those who doubt the effectiveness of this treatment for pain attribute the pain relief to a placebo effect: if a patient believes something will reduce their pain, they will experience some relief.
c) This ancient form of pain relief and stimulation is said to benefit patients by blocking channels which practitioners claim allow pain to travel within the body.
d)For anyone considering acupuncture treatment, they should first research its effectiveness for their specific condition.
The study of biology is important because it focuses on what?
Answer:
Explanation:all livings things
Winds move in a _____ direction in the Northern Hemisphere and in a _____ direction in the Southern Hemisphere because of the Coriolis effect.
counterclockwise, clockwise
clockwise, counterclockwise
polar, equatorial
equatorial, polar
Answer:
The correct option is counterclockwise, clockwise
Explanation:
Hello ! Let's solve this!
The coriolis effect causes that an object that moves in a system that moves, produces an additional acceleration.
The coriolis effect is a force that makes the wind in the northern hemisphere counterclockwise.
In the southern hemisphere, the wind will be hourly.
The correct option is counterclockwise, clockwise
The snapping turtle shown above, lives in a small farm pond, where its major prey is largemouth bass. In turn, the bass primarily eat emerald minnows. This snapping turtle weighs 40 pounds. If the pond has 10 mature snapping turtles of this size, how many pounds of minnows are required to support them? [Use the 10% law across each trophic level.]
A) 400
B) 4,000
C) 40,000
D) 400,000
The equation below represents a summary of a biological process
carbon dioxide+water--->glucose+water+oxygen
This process is completed in
1.) Mitochondria
2.) Ribosomes
3.)Cell Membranes
4.) Chloroplasts
The equation represents photosynthesis, a process in which chloroplasts of plant and algal cells convert carbon dioxide and water into glucose and oxygen using sunlight energy.
The equation, carbon dioxide + water ---> glucose + water + oxygen, represents the process of photosynthesis. This biological process occurs in the chloroplasts of plant and algal cells. During photosynthesis, chloroplasts use the energy from sunlight to convert carbon dioxide and water into glucose and oxygen. Glucose serves as a vital source of energy and a building block for plant biomass, while oxygen is released as a by-product, playing an essential role in maintaining life on Earth by supporting aerobic respiration in animals.
If purple flower color is dominant and red flower color recessive, how many phenotypes are possible in offspring of homozygous purple crossed with homozygous red?
1 2 3 4 I put 1.
Answer: The correct answer is 1 phenotype.
Dominant trait ( depicted by capital letter) masks the expression of recessive trait ( depicted by small letter).
As per the question, purple flower color is dominant and red flower color is recessive. Let 'P' allele corresponds to purple color and 'p' corresponds to red color.
The possible genotypes for purple flower is 'Pp' and 'pp' whereas for red flower is 'pp'.
Genotypes of parent plants, which are homozygous for purple and homozygous for red are PP and pp respectively.
When these plants are crossed, they result into heterozygous purple (Pp) offspring that is phenotype of all offsprings in first generation is Purple
Refer punnett square.