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Nikitich [7]
3 years ago
10

Do all animals share a common ancestor?

Biology
1 answer:
Nastasia [14]3 years ago
6 0

Answer:

The most recent common ancestor of all currently living organisms is the last universal ancestor, which lived about 3.9 billion years ago. ... 6,331 groups of genes common to all living animals have been identified; these may have arisen from a single common ancestor that lived 650 million years ago in the Precambrian.

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In the peppered moth scenarios what is the variation? And the selection?
Morgarella [4.7K]

Variation is number of alleles for the wing color of the peppered moths. The wing color ranges from pure white to pure back.

Selection pressure is predation by birds.

Explanation:

In the wake of the industrial revolution, white-winged peppered moths had a large allelic frequency in the population compared to black-winged peppered moths. However, when the environment changed due to soot produced by industries (making the environment darker) white-winged peppered moths reduced while that of black moths increased.

This is because black moths were able to blend in and camouflage in the dark environment than white-winged peppered moths that stood out to their predators. Black moths, therefore, had an increased chance of reaching adulthood and passing their genes to the next generation. This increased the allelic frequency of black-winged peppered while that of white-winged moths reduced in the population.

Learn More:

For more on natural selection of peppered moths check out;

brainly.com/question/12918325

brainly.com/question/9231156

#LearnWithBrainly

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3 years ago
Amoeba sisters: nature of science
Masteriza [31]

Answer:

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List three reasons that snow predictions made by meteorologists are sometimes incorrect
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The conditions depend on the density level of the snow.

Another reason is the imperfect data gathering especially if initial results are only gathered.

The third reason is that computer models still find it difficult to see small scale phenomena.

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What concept developed by Malthus influenced Darwin? A. the principle of scarce resources B. the principle of natural selection
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the princpal of natural selection

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