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fenix001 [56]
1 year ago
6

Smallpox was once endemic in india and africa, where there were low frequencies of the allele for type a blood. what did this su

ggest to scientists?
Social Studies
1 answer:
Makovka662 [10]1 year ago
7 0

That type of blood increased susceptibility to smallpox.

Which of the following best explains why, given the A allele's vulnerability to smallpox, natural selection did not eradicate it?

Diseases that the A type is not vulnerable to can affect other blood types.

Do you think that diseases can impact natural selection in any way?

A species will have a better chance of surviving than others if it has evolved tolerance to particular germs.

Why did people acquire dark skin?

  • People who lived in regions with strong sunlight evolved dark skin tones as a result of natural selection to guard against ultraviolet (UV) rays, primarily to prevent their bodies from folate depletion.
  • UV rays from the sun are what led to skin pigmentation during evolution.

Learn more about ultraviolet (UV) rays

brainly.com/question/1377878

#SPJ4

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Alex_Xolod [135]

The correct answer is - fertile soil.

The Great European Plain, also referred to as the Russian Plain, is dominated by lowlands, naturally covered with dense grasses, and is known for its fertile soil. Most of the soil in this large plain is has very rich and deep upper, humus layer. The reason for this is that the grasses that grow their die out each year, and as they die out they decompose very quickly, giving the soil a new layer of decomposed biomass each year.

Because of the properties of the soil, this the region of Europe that is heavily used for farming, mostly crops like the wheat, hops, and corn. The conditions are excellent for them, they do not take a lot of the soil, and also contribute to keeping the soil very fertile constantly with their decomposing roots and steams.

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A special-purpouse district, within the US administration, is a goverment unit created to serve a specific objective and separated from local goverments, such as those which govern a town, city, county, etc, hence enjoying administrative and fiscal independence. For instance, school boards are one example as they are fully dedicated to the educative function and other aspects related to it.

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Martin Luther King Jr was an African American de-segregationist who was one of the important leaders of the anti-slavery and anti-segregation movement.

<h3>The Albany Movement</h3>

This refers to the anti segregation movement which began in Albany, Georgia in the year 1961 as they led a national movement to try and end all forms of discrimination.

Please note that your question is incomplete so I gave you a general overview so that you could get a better understanding of the concept.

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