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antiseptic1488 [7]
3 years ago
11

What is carbon fixation?

Biology
1 answer:
irina1246 [14]3 years ago
8 0

Answer:

D.both A and B

Explanation:

because if there some option,like abcd and the letter d. is both a and b that is the correct answer.

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Variations are caused by mutation. random mating between organisms.

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[Ar] 4s1 is the correct answer

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Name the structure that increases the surface area of the small intestine in humans.
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The name of the structure that increases the surface area of the small intestine in humans is Villi.

<h3>What are the functions of the small intestine?</h3>

The small intestine performs a key role in the digestion of undigested food which comes through the stomach. It also absorbs all the essential minerals and nutrients from the food and is used by the body.

Villi or microvilli is the structure that increases the surface area of the small intestine for food absorption and adding digestive secretions.

Therefore, the name of the structure that increases the surface area of the small intestine in humans is Villi.

To learn more about the Small intestine, refer to the link:

brainly.com/question/17315460

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Speciation, which leads to diversity among species through natural selection, occurs when
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Natural selection and speciation: 'Ecological speciation'. ... Natural selection is generally recognized as a central mechanism of evolutionary change within species. Thus, natural selection plays a major role in generating the array of phenotypic and genetic diversity observed in nature.

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