Answer:
The water on earth changes forms as it moves from one reservoir to another.
Explanation:
The other two answer choices are
1: as water moves through an ecosystem, its energy is lost between trophic levels.
2:The water on earth changes forms as it moves from one reservoir to another.
and
3: Water in the atmosphere must be converted to another chemical before animals can use it
The correct answer of course would be answer choice 2. It does change forms as in states of matter from liquid to gas (water vapor) to solid (ice) and back again. This is the best summery of what the water cycle means.
1 is incorrect because it violates the law of conservation of energy. Water has nowhere to go so it stays on the surface of the earth.
And three is wrong because it simply does not describe the water cycle.
Natural selection has been the process that allows organisms to adapt to changes. Heritable variations for some traits are required for natural selection. Thus, option A is correct.
Natural selection has been defined as the process of survival and reproduction that are evident in evolution and are characteristic of a population or generation of the species.
For natural selection to occur variations, existence and inheritance are the major requirements that are crucial for the organism to show the adaptation and evolutionary process.
Traits inherited from the previous generation must show some variation so as to make the current generation more beneficial and selectable over the ancestral generation.
Therefore, option A. the heritable variations of some traits are an important factor for natural selection.
Learn more about natural selection, here:
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Your question is incomplete, but most probably your options were,
Answer:
1. heritable variations for some traits
Explanation:
Assuming the options are:
there are four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Answer:
In the light-independent reactions or Calvin cycle, the energized electrons from the light-dependent reactions provide the energy to form carbohydrates from carbon dioxide molecules. ... In addition, several enzymes of the light-independent reactions are activated by light.
skin conditions
B.
the rest of the endocrine glands
C.
the regeneration of nerve cells
D.
involuntary motor skills
Yup the answer is B on engenuity
Answer:
the purpose of testing whether the surface texture of the ground affects the distance an object can roll is to understand how different ground textures impact the movement of objects. By conducting this experiment, we can determine whether objects roll farther or shorter distances depending on the surface they roll on.
Explanation: