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bulgar [2K]
2 years ago
9

What is the difference between genetic drift and natural selection?

Biology
1 answer:
IrinaK [193]2 years ago
4 0
A) Genetic drift is the random increase or decrease of genes in a population. Natural selection is not random.

Genetic drift is the change in the frequencies of alleles in a population due to chance events (random survival). Genetic drift exhibits strong effects in small populations and plays a smaller role the larger the population gets. Natural selection is the non-random change in the frequency of alleles in a population over time, because the change in frequency of the alleles is dictated by the different relative fitnesses that different alleles confer.
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The periosteum is secured to the underlying bone by ________.
PSYCHO15rus [73]

The periosteum is secured to the underlying bone by <u>extensions of highly resistant collagen fibers called Sharpey's fibers</u>.

The periosteum covers the external part of the bones, except in those spaces where tendons, ligaments or joints are inserted.

From the periosteum a series of extensions come out that go to the cortical and that tie it, these extensions are called Sharpey fibers that strongly tie the periosteum to the cortical, which are highly resistant collagen fibers.

During the early ages, the periosteum is very active and Sharpey's fibers anchor the periosteum to bone very well, but as we age, the active periosteal layer thins and Sharpey's fibers become less effective.

The periosteum is very important due to its rich vascularization, which is very important in the fracture healing process.

Therefore, we can conclude that the periosteum covers the bones on the outside, in fact it is the outermost part and the link with each bone is through extensions of highly resistant collagen fibers called Sharpey's fibers.

Learn more here: brainly.com/question/4122749

7 0
2 years ago
The structures that project from the cell membrane
Slav-nsk [51]
Cell wall because it protects the cell membrane.
8 0
3 years ago
Please help don’t have a lot of time
damaskus [11]

The answer would be 8, because in mitosis it creates and identical cell

5 0
3 years ago
Part A Match the structures with their appropriate functions: O Roots allow plants to obtain water, nutrients and glucose, while
makvit [3.9K]

Answer:

The correct answer is - Roots allow plants to obtain water and nutrients, while shoots allow plants to obtain gases and sunlight.

Explanation:

Plants have two major parts of the body normally root and shoot. roots are the parts of plants that usually present under the ground and absorbed the essential nutrients and minerals for the life of the plant. Water is also absorbed by the roots that are used in the various processes such as transpiration and photosynthesis.

The shoot includes stem and leaves and responsible for the exchange of gases, particularly taking in carbon dioxide and removes oxygen with help of stomata. These also absorbs sunlight with help of chlorophyll present on the leaves.

8 0
3 years ago
Fruit flies use the Z-W sex determination system<br><br> True or false
const2013 [10]

Answer:

The answer to this question is false

3 0
3 years ago
Read 2 more answers
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