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ankoles [38]
3 years ago
5

With 20 points, please answer!

Biology
1 answer:
OverLord2011 [107]3 years ago
6 0
Thermal energy. I took the quiz!
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PLEASE I NEED HELP
yawa3891 [41]

Answer:

they ensure valid results

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3 years ago
Read 2 more answers
The rain shadow effect is used to describe rainfall around certain mountain ranges. Which of the following statements is true?
WARRIOR [948]
(E) none of the above statements are true
rain almost always comes from west to east so the western side of the mountain ranges would get more rain. A and C are not very relevant to the question<span />
8 0
3 years ago
Base your answer to the question on the passage below and on your knowledge of biology
Delvig [45]

Darwin concluded that the finches all shared a common ancestor but had  developed different beak structures.  The second sentence best describes as an ecosystem.

Explanation:

  • When Charles Darwin traveled to the Galapagos Islands, he observed 14 distinct varieties of finches on the islands Darwin also observed that each finch variety  ate a different type of food and lived in a slightly different habitat from the other finches, Darwin concluded that the finches all shared a common ancestor but had  developed different beak structures. The second sentence best describes as an ecosystem.
  • An ecosystem is a huge group of living organism such as plants,animals, micro-organisms in a particular area.
  • An ecosystem is a community of living organisms related with the nonliving components in the  environment, together interacting as a system.
  • its abiotic constituents, includes minerals, climate, soil, water, sunlight, and all other nonliving elements, and its biotic constituents, consists of all its living members.

4 0
3 years ago
Nitric oxide was discovered as a secondary messenger in the 1980s and has grown in popularity since that time. In fact, it was n
Allisa [31]

Answer:

The main function of viagra is to relax the muscles of the blood vessels in some areas of the body. It is used for the treatment of erectile dysfunction and for high blood pressure. The component of viagra is a competitor to the enzyme PDE5, breaking down cGMP. In the penis, blood is trapped, which results in the erection being maintained. When cGMP levels decrease, the concentration of calcium ions increases, causing smooth muscle contraction.

Explanation:

8 0
3 years ago
Modern Native Americans have very high frequencies of Type O blood. In some places in North and South America, the frequency is
Brilliant_brown [7]

Native Americans and Type O Blood

Modern Native Americans have very high frequencies of Type O blood.

In some places in North and South America, the frequency is as high as 100%. Anthropologists believe that early Native Americans arrived in North America by crossing over the Bering Land Bridge around 15,000 years ago, from East Asia.

Modern East Asian populations, with whom modern Native Americans share ancestry, do not have high frequencies of Type O blood. Instead, they have some of the lowest frequencies of Type O blood in the world.

B. Sickle-Cell Anemia

As many as 20-30% of people living in equatorial Africa have at least one allele on Chromosome 11 that codes for sickle-cell anemia (they have an, "S" rather than an, "A" allele). This is odd because usually, 80% of people who have two S alleles die before they can reproduce,

For each of the following cases:

1. What forces of evolution are at work?  State all that apply.

Mutation

Natural Selection

Genetic Drift

Gene Flow.

Learn more about Anthropologists at

brainly.com/question/13728734

#SPJ4

8 0
2 years ago
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