Answer:
Directional selection, stabilizing selection and disruptive selection are three types of natural selection. They are also examples of adaptive evolution. ... Selection pressures act against organisms that do not have favorable traits and they are removed from the population.
Explanation:
<span>The functions of the skin include ?
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Electricity black outs lightning and loud noises
A. The concentration of water should be higher on the outside because it allows water to slow into the cell to balance the concentration.
Answer:
The correct answer is option - C amino acids.
Explanation:
The blood brain barrier or BBB is border that separates extracellular fluid in the central nervous system (CNS) and the blood that is circulating from the brain.
This barrier is allows the passage by facilitate diffusion (passive diffusion) and through the selective proteins of molecules such as glucose, amino acids that are essential for the neural function.
Thus, the correct answer is - amino acids.