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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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Molly loves early mornings but Patrick has a hard time waking up before ten each day. Molly and Patrick have different
kirza4 [7]

Answer:

chronotypes

Explanation:

<u>Chronotype is the behavior and preferred bodily and psychological schedule of one’s activity and sleep.</u> It regulates what is the best time for someone to sleep during the day. The people who usually function at the night (like Patrick) prefer the eveningness and delayed sleeping period, while people who easily wake up and do their tasks early (like Molly) are more into morningness and advanced sleep periods.

Most people are flexible, and their schedules and types change in accordance with age, life stage, events, and tasks. However, <u>chronotype also affects our traits, productivity, and effectiveness of our performance, and relaying which type is the best of us we can raise our productivity.</u>

8 0
3 years ago
Which statement about the 14th amendment accurate
mina [271]

Answer:

The adoption of the 14th Amendment in 1868 guaranteed citizenship to those born or naturalized in the United States, including former slaves. Black Americans would face subsequent challenges to their civil and political rights, but the 14th Amendment ensured that they would never again face the threat of removal

6 0
3 years ago
Ebola virus is an example of a pathogen associated with which risk group?.
DedPeter [7]
Risk Group 4 agents cause serious or lethal human or animal disease and are readily transmitted. Effective treatment and preventive measures are not usually available. Examples include: Smallpox virus, Ebola virus. No bacteria, fungi, or parasites in this group.
5 0
2 years ago
How high did the unemployment rate go during the Great Depression.
timama [110]

The unemployment rate went as high as 24.9% during the great depression.

3 0
3 years ago
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When is it appropriate to limit students free speech at school?
arlik [135]

Answer:

In 1988, the U.S. Supreme Court ruled in Hazelwood School District v. Kuhlmeier that public school officials can censor school-sponsored student expression as long as they have a valid educational reason for doing so. This decision has given school officials broad authority to regulate school-sponsored publications.

Explanation:

6 0
3 years ago
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