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3 years ago

Identify the four postulates of natural selection. select all that apply.

1 answer:

6 0

Here are the four postulates of natural selection, according to Charles Darwin:
1. variability - refers to different mutations that create different species
2. heritability - refers to the genes that are passed from one organism onto its descendants
3. overproduction of offspring - refers to the fact that more "children" is born than dies
4. natural selection - refers to those organisms that survive because they adapt to their surroundings better than those who will die

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aleksandrvk [35]

Answer:

absorption of water

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4 years ago

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It's estimated that all the chromosomes together house about 20,000 individual instructions calledImmersive Reader

lorasvet [3.4K]

Answer:

Hi, there your answer is A. Genes

Explanation:

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3 years ago

In __________ contraction the amount of tension increases during contraction, but the length of the muscle does not change.

babymother [125]

Answer:

Isometric

Explanation:

Isometric contraction may be defined as the type of contraction that produces the muscle tension. No change in the angle of the skeletal joint is noticed in the isometric contraction.

The sarcomere shortens during the muscle contraction this causes the increase in the muscle tension of the muscle. The length of the muscle do not change in the isometric contraction. The isometric contraction is important for maintaining posture.

Thus, the correct answer is isometric contraction.

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3 years ago

Read this line that is spoken by Sir Gawain in the passage. You are like an actor who has practiced his lines. This is an exampl

Pani-rosa [81]

Answer:

$\huge\boxed{\sf simile}$

Explanation:

Comparing objects or things using "as" or "like" is referred to as "simile".

"You" is being compared to "actor who has practiced his lines" using "like" for being "well-prepared".

$\rule[225]{225}{2}$

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2 years ago

In chickens, the allele for feathered legs (F) is dominant over the allele for bare legs (f). In a population of chickens on a f

exis [7]

Answer:

0.5

Explanation:

According to Hardy-Weinberg equilibrium p2+2pq+q2=1 (p+q=1)

p2 is frequency of the dominant homozygous genotype

2pq is the frequency of the heterozygous genotype

q2 is the frequency of the recessive homozygous genotype

In the example above 80 chickens have bare legs (ff)-recessive homozygous which means that the frequency of that genotype is 80/240+80=0.25 (q2), frequency of the recessive allele is $\sqrt{0.25}$ =0.5. This means that the frequency of the dominant allele (p) is 1-0.5=0.5

So, the frequency of the heterozygous genotype (2pq) is 2*0.5*0.5=0.5

The frequency of the dominant homozygous genotype is p2=0.25

7 0

4 years ago