1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elena L [17]
3 years ago
10

In the United States, the parasite that causes malaria is not present, but it is present in African-Americans whose ancestors we

re from equatorial Africa. What should be happening to the sickle-cell allele in the United States, and what should be happening to it in equatorial Africa?
Biology
1 answer:
slava [35]3 years ago
5 0

Answer: DIRECTIONAL SELECTION; STABILIZING SELECTION.

Explanation: In the United States of America the parasite that causes Malaria is not present,the parasite that causes Malaria are known to be a protozoa of the Plasmodium specie(Plasmodium: P. falciparum, P. malariae, P. ovale and P. vivax.).

DIRECTIONAL SELECTION is also known as positive selection where an advantageous allele increases as a consequence of differences in survival rate and reproduction among different phenotype Population.

STABILISING SELECTION is a type of natural selection in which a trait tend to remain stable,no one trait is felt more.

You might be interested in
Which phrase best describes meiosis I? Choose the correct answer.
Charra [1.4K]

Answer:

Creation of to diploid cells

Explanation:

yeh

8 0
2 years ago
What type of symmetry does an organism have if it has five identical parts extending from a central hub? A. bi-radial symmetry B
lapo4ka [179]
Pretty sure it <span>C) penta-radial symmetry.</span>
4 0
2 years ago
Which layer is between the asthenosphere and the outer core?
masya89 [10]

the lithosphere is inbetween

4 0
3 years ago
Read 2 more answers
Where is the carbon taken in by plants during photosynthesis stored?
AURORKA [14]
The answer is b. plant structures.

Photosynthesis is the process by which plants use solar energy to produce glucose from carbon dioxide and water. Carbon dioxide enters the leaves, plant structures, through the<span> stoma and is incorporated into organic compounds. </span>
8 0
3 years ago
Read 2 more answers
5. A proposed set of statements or principles used to explain a group of facts or natural phenomena is a
aev [14]

Answer:

theory

Explanation:

A proposed set of statements or principles used to explain a group of facts or natural phenomena is a theory.

4 0
2 years ago
Other questions:
  • Can light cause changes metal
    11·2 answers
  • What would a scientist most likely do to demonstrate the effects of a tsunami?
    7·2 answers
  • PLEASE HELP ME Which of the following codes for a specific protein? DNA gene enzyme chromosome Which of the following is single-
    9·2 answers
  • One of the most serious infections of the upper respiratory system is ________.
    11·1 answer
  • What factor limits the number of eclipses per year
    11·1 answer
  • What type of protein only stays on the surface of the plasma membrane
    12·2 answers
  • What type of cells have a high concentration of mitochondria?
    14·1 answer
  • Muscles that produce movement in a single direction are
    11·1 answer
  • Explain the benefit of an increase in capillary-action to a hockey player.
    11·1 answer
  • .The major organs of circulatory system are
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!