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uysha [10]
2 years ago
6

Take a look at the layers of earth and the fossils in each layer. The fossils show us that life forms changed in an area. Compar

e the oldest life forms to the newest. What comment can you make about the change in the environment?
Biology
2 answers:
frez [133]2 years ago
5 0

The change in the environment affected how the organism would evolve to be so that it could survive. the term for that is survival of the fittest, and only the fittest would be able to survive the conditions of its surrounding environment. hope this answered your question. :)

Nonamiya [84]2 years ago
4 0

Answer:

The environment changed from underwater to land.

Explanation:

it goes from sea life to leaves.

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The calcium ions then attaches with troponin molecule. This changes the shape of troponin and removes the tropomyosin protein from the binding site.  No ATP is available during this process.

Thus, the correct answer is option (d).

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During drought years, seeds with thin coats are more likely to desiccate (dry out) and not be able to germinate
Morgarella [4.7K]

Directional selection favors one of the extreme phenotypes. Option B). Fewer plants with thin seed coats will be able to germinate, leading to a higher proportion of plants that produce seeds with thick seed coats.

<h3>What is directional selection?</h3>

Directional selection increases in the proportion of individuals with an extreme phenotypic trait.

There must be a selective pressure or environmental pressure acting on populations to lead the species to increase the number of individuals expressing that extreme phenotype.

This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.

In the exposed example the environmental pressure is drought during several years.

Drought periods decreases the fitness of plants that produce thin seed coats because they dehydrate before germinating.

Originally the population expressed both types of seeds. But after the drought pressure, only plants that produce seeds with thicker coats got to survive and reproduce.

The correct option is B). Fewer plants with thin seed coats will be able to germinate, leading to a higher proportion of plants that produce seeds with thick seed coats.

You can learn more acout directional selection at

brainly.com/question/12226774

#SPJ1  

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2 years ago
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