Answer:
a) Astrocytes
Explanation:
The astrocytes are components of the central nervous system that provide the necessary supports that the brain needs to perform vital tasks such as learning and other daily activities. They are typical cell types in the central nervous system that aid blood flow in the brain as well as the migration of neurons.
Answer:
( 1 ) If the plasma membrane ruptures or breaks down then the cell will not be able to exchange material from its surrounding by diffusion or osmosis. Thereafter the protoplasmic material will disappear and the cell will die.
( 2 ) If there is no Golgi apparatus in the cell , the plasma membrane would be affected because it needs to be able to grow larger for cell division. creation of lot of excess junk would occur in the cell. If this happened the cell would not able to live for long period.
Explanation:
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Answer: A, Natural selection favors G6PD deficiency as compared to malaria.
Explanation:
We can eliminate B. This is because genetic drifts are changes in genes due to chance. The changes in the genes of the African Americans were not due to chance because there was a cause: malaria.
We can also eliminate C. This is because somatic mutations are mutations that can occur in every cell except the germ cells (sperm, egg), therefore meaning that the mutations that occur cannot be passed onto the offspring.
D(oxygen) since the mass of the human body is made of six elements oxygen takes up the most percentage
