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MAVERICK [17]
2 years ago
8

Seeds that pass through the digestive tracts of birds and mammals must have hard seed coats to?

Biology
1 answer:
Oxana [17]2 years ago
8 0

Seeds that pass through the digestive tracts of birds and mammals must have hard seed coats to resist stomach acids and digestive enzymes.

Stomach acids and digestive enzymes help out in the digestion of food and other hard substances such as seed coats.

Pepsin is an elementary digestive enzyme that digests proteins in food and is secreted by the gastric cells.

Moreover, the lining of the stomach contains parietal cells which release hydrochloric acid in order to reduce the pH.

In sum, digestive enzymes and fluids are essential for the breakdown of complex molecules of proteins and food particles.

If you need to learn more about digestive enzymes click here:

brainly.com/question/11678128

#SPJ4

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olga55 [171]

Adaptive genes are selected and passed from generation to generation.

<h3>Natural selection and the evolution of long necks in giraffes</h3>

According to Darwin's theory of natural selection, natural selection selects for adaptive genes in organisms and deselects non-adaptive genes.

Thus, adaptive genes are passed from generation to generation.

In the case of the giraffes. It is plausible that their ancestors kept on stretching their necks in order to feed as the trees they fed on kept growing taller. The taller the tree grows, the longer the ancestors of giraffes stretched their necks to reach it. Otherwise, they just might have to die of starvation.

This adaptation activated the long-neck genes in the ancestors of giraffes. Natural selection selects this trait and it was passed down across generations.

More on natural selection can be found here: brainly.com/question/9830102

#SPJ1

7 0
2 years ago
What is the benefit of an uneven production of gametes in oogensis?
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This shouldn't be hard, but my brain is refusing to work on this question.Please Help!
dybincka [34]
The correct answers A false


6 0
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In agranulocytes, what happens to the cytoplasm as the cell ages?
pishuonlain [190]

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Explanation:

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