The blood-brain barrier functions to regulate the movement of materials from the blood to the brain (option A).
<h3>What is the blood-brain barrier?</h3>
The blood-brain barrier is a structure in the central nervous system (CNS) that keeps various substances found in the bloodstream out of the brain while allowing in the substances essential to metabolic function, e.g. oxygen.
The blood-brain barrier serves as a protective barrier for the brain that prevents the entry of substances in the bloodstream that can cause brain damage.
Therefore, the blood-brain barrier functions to regulate the movement of materials from the blood to the brain.
Learn more about blood-brain barrier at: brainly.com/question/9643165
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I do not know much about galapagos finches (have not read darwin maybe I should) . But you can be sure evolution is taking place on any species anytime. It is not about which species it is or what time it is. Evolution keeps going. Species keep changing, evolving, maybe very slowly, but it happens all the time.
The Earth is tilted at a 23.5° angle.
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They study the earth and its physical materials
