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9966 [12]
3 years ago
14

Nails are made of:

Biology
1 answer:
Fudgin [204]3 years ago
6 0

Answer:

keratin

Your nails are made of keratin

Keratin is a type of protein that forms the cells that make up the tissue in nails and other parts of your body.

Explanation:

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What does the range of a population tell you that density does not ?
Ilia_Sergeevich [38]
It specifies what exactly the variations are of whatever population is being examined.
6 0
4 years ago
Which was part of Aristotle’s primary biological classification system?
solniwko [45]
He first divided all living organisms in 2 groups
Animal or Plant

He then put these into subgroups
Animal subgroups: land, water, air
Plant subgroups, small medium or large

Not a very specific approach to taxonomy but it was used for well over 100 years
4 0
3 years ago
List and explain the 3 paths natural selection can take.
evablogger [386]

Answer:

1. Stabilizing Selection  

2. Directional Selection  

3. Disruptive Selection  

Explanation:

Stabilizing Selection  

This type of natural selection occurs when there are selective pressures working against two extremes of a trait and therefore the intermediate or “middle” trait is selected for. If we look at a distribution of traits in the population, it is noticeable that a standard distribution is followed:

Example:  For a plant, the plants that are very tall are exposed to more wind and are at risk of being blown over. The plants that are very short fail to get enough sunlight to prosper. Therefore, the plants that are a middle height between the two get both enough sunlight and protection from the wind.

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:

Example: An area that has black, white and grey bunnies contains both black and white rocks. Both the traits for white and black will be favored by natural selection since they both prove useful for camouflage. The intermediate trait of grey does not prove as useful and therefore selective pressures act against the trait.

6 0
3 years ago
Cuales son la caracteristicas de un cuento?<br><br> pdt:puse bilogia porque no encontre lenguaje
Arlecino [84]

Answer:

Hello!!! Princess Sakura here ^^

Explanation:

What are the characteristics of a story?

5 0
3 years ago
20 points!!!!!!<br> Do prokaryotes have ribosomes? Why?
solniwko [45]

Answer:

yes they do because every cell needs ribosomes to manufacture proteins  

3 0
3 years ago
Read 2 more answers
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