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bezimeni [28]
3 years ago
9

Scientists group organisms into three domains: Archaea, Bacteria, and Eukarya. In which domain are animals classified and why?

Biology
1 answer:
Sever21 [200]3 years ago
8 0
Eukarya. This is because their cells all have a nucleus. While prokaryotes like archaea and bacteria don't have one, eukarya have a nucleus.
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1. Stabilizing Selection  

2. Directional Selection  

3. Disruptive Selection  

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Stabilizing Selection  

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Directional Selection  

This type of natural selection occurs when selective pressures are working in favour of one extreme of a trait. Therefore when looking at a distribution of traits in a population, a graph tends to lean more to one side:

Example: Giraffes with the longest necks are able to reach more leaves to each. Selective pressures will work in the advantage of the longer neck giraffes and therefore the distribution of the trait within the population will shift towards the longer neck trait.

Disruptive Selection  

This type of natural selection occurs when selective pressures are working in favour of the two extremes and against the intermediate trait. This type of selection is not as common. When looking at a trait distribution, there are two higher peaks on both ends with a minimum in the middle as such:

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