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elena55 [62]
3 years ago
12

What is the purpose of a data table

Biology
1 answer:
Marat540 [252]3 years ago
3 0

Data tables help us understand information by comparing and contrasting it with visual proof. Sorry, that's all I could come up with.

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If the mean amount of glucose produced at 10 min is 580mg/dL, what is the rate of
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PLEASE PLEASE HELP ME!!!! (10 POINTS!)
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en Espanol en Español     print print

Bottlenecks and founder effects

Genetic drift can cause big losses of genetic variation for small populations.

Population bottlenecks occur when a population's size is reduced for at least one generation. Because genetic drift acts more quickly to reduce genetic variation in small populations, undergoing a bottleneck can reduce a population's genetic variation by a lot, even if the bottleneck doesn't last for very many generations. This is illustrated by the bags of marbles shown below, where, in generation 2, an unusually small draw creates a bottleneck.

Loss of genetic variation as a result of a population bottleneck

Download this graphic from the Image library.

Reduced genetic variation means that the population may not be able to adapt to new selection pressures, such as climatic change or a shift in available resources, because the genetic variation that selection would act on may have already drifted out of the population.

Elephant seal

 

An example of a bottleneck

Northern elephant seals have reduced genetic variation probably because of a population bottleneck humans inflicted on them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000 — but their genes still carry the marks of this bottleneck: they have much less genetic variation than a population of southern elephant seals that was not so intensely hunted.

Founder effects

A founder effect occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have:

reduced genetic variation from the original population.

a non-random sample of the genes in the original population.

For example, the Afrikaner population of Dutch settlers in South Africa is descended mainly from a few colonists. Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington's disease, because those original Dutch colonists just happened to carry that gene with unusually high frequency. This effect is easy to recognize in genetic diseases, but of course, the frequencies of all sorts of genes are affected by founder events.

Explanation:

7 0
3 years ago
What substance, produced during photosynthesis,
cricket20 [7]

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Glucose is the substance produced during photosynthesis which provides food for plants and animals in a food web.

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The main source of energy in a food chain or food web is made by the producers. These producers are mostly plants that make food by the process of photosynthesis. As a result of photosynthesis, glucose is made as the main product whereas oxygen is made as the by-product. Glucose made is used to drive energy for all the activities of the cell. This energy, released from glucose,  is carried within an ecosystem from one organism to another.

3 0
3 years ago
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you run 100m in 25s. If you later run the same distance in less time, explain if your speed increases or decreases
Len [333]
Your speed would have been encreased because you are able to get to the distance quicker in less time.
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Why does the presence of a hair follicle have forensic importance?
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Answer:

C

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Our hair follicles hold DNA just as do our finger nails, saliva, and blood.

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