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Luba_88 [7]
3 years ago
6

What factor are necessary for natural selection to occur?

Biology
1 answer:
sergeinik [125]3 years ago
8 0

1.Reproduction

2.Heredity

3.Variation in fitness or organism

4.variation in individual characters among members of the population

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sergey [27]

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The parasite that causes malaria in humans, is located in the liver cells where it then multiplies then transfers into the red blood cells.

B) Liver

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When it is winter in South America, in North America it is
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it is summer and north America

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A man with normal vision marries a color-blind woman. Red-green color blindness is an X- linked recessive disorder. They have a
jeyben [28]

Answer: The probability is 100%.

Explanation: The chromosome X is related to gender. A man carries two different chromosomes (XY) and a woman carries two similar chromosomes (XX). The offspring of a couple will inherited:

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  • If it a girl, she inherites X from her father and X from her mother;

In the question, the woman is color-blind, which means she carries the recessive alleles: X^{d}X^{d}

The man, on the other hand, is normal, so his X-linked genotype will be: X^{D}Y.

Now, since they have a daughter, she inherited her double X from each of her parents, which means she inherited one X^{d} from her mother and one X^{D} from her father.

So, the daughter's genotype can only be heterozygotic  X^{D}X^{d} in other words, the probability is 100%.

5 0
3 years ago
Which life activity is not vital for the survival of an individual organism
Anestetic [448]
Reproduction, I am pretty sure

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5 0
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What is the oxidizing agent in the following reaction?
Andru [333]

Answer:

The answer is d. pyruvate

Explanation:

An oxidizing agent is the substance that gains electrons in a chemical reaction. At the end of the reaction it is reduced and its oxidation state increased.

A reducing agent is the substance that loses electrons in a chemical reaction. At the end of the reaction it is oxidized and its oxidation state decreased.

Pyruvate gains one electron, it is reduced from pyruvate to lactate; thus, pyruvate is the oxidizing agent.

NADH loses one electron, it is oxidized from NADH to NAD; thus, NADH is the reducing agent

3 0
3 years ago
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