How are directional selection and disruptive selection similar? how are they different?

1 answer:

6 0

The similarity between directional and disruptive is that both are types of selection on polygenic traits in which the curve shift away from the middle.

The different between disruptive and directional is in disruptive move toward both ends . And in directional, the curve shift toward one end.

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A bird is observed to nest along the coastline. It then spends hours out in the open ocean feeding on fish. What is this behavio

3241004551 [841]

Answer:

Nesting & Foraging behavior

Explanation:

Seabirds are generally tertiary consumers and / or marine predators that, in marine foodwebs, occupy the upper trophic level. They are very well adapted to all marine ecosystems and feed on a variety of prey: from micro-crustaceans to fish and cephalopods.

Generally, seabirds are observed performing a nesting behavior, by laying eggs near the shore, and then are found exhibiting foraging behavior -searching and foraging for prey- in both the coastline and pelagic zone, also known as the open sea.

Seabirds exhibit different foraging behaviors, for example, the surface feeding behavior which involves flying along the surface with their beak in the water. Gulls, albatrosses and petrels are examples of surface feeders.

On the other hand, plunge diving involves preying on fast marine organisms by diving into the water during their flight. Pelicans are example of seabirds who engage in this behavior.

8 0

3 years ago

(I already know number 1)

Andrej [43]

2. All cells arise from pre existing cells(Rudolf Virchow). Cell is the fundamental, structural and functional unit of all organisms(Schleiden and Schwann).
3. All cells have a cell membrane.
All cells have chromosomes present.
All cells have cytoplasm.
4.Eukaryotic cells contain a nuclear membrane but Prokaryotic cells have only pseudo nucleus
Eukaryotic cells contain membrane bound organelles but prokaryotic cells don't.

5 0

2 years ago

Which pharmacokinetic parameter is affected most by decreased intestinal motility related to the aging process? a. excretion b.

Tpy6a [65]

I believe the answer is c. absorption

The phase of pharmacokinetic that happens in the intestine is when the drug absorbed. A person with old age will have lower intestine motility. This will increase the transit time which will increase the amount of drug absorbed.

Age could also influence others pharmacokinetic parameter(excretion, distribution, metabolism) but it is related with another organ, not intestine.

8 0

2 years ago

What is a list of types of organisms in an eco pyramid?

gtnhenbr [62]

Termites, koalas, field mice, and deer.

7 0

3 years ago

What cell parts are common to all of these cells? Use complete sentences.

Natalka [10]

Answer:

between an animal cell and a plant cell there are some parts that are similar and carry out the same function like:

both have a cell membrane which selects what goes in the cell.

both have cytoplasm which holds the protoplasm(the living part of the cell)

both have a nucleus which carries out all cell activities and holds threads of DNA called chromosomes

both have a mitochondria which is the power house of the cell

both have golgi bodies which modify and carry proteins from sites of synthesis to sites of reaction

I hope this helps

4 0

2 years ago