The answer is A) food web. B is not actually a thing, and C and D are very different vocab words.
Explanation:
Reflexes do slow with age. Physical changes in nerve fibers slow the speed of conduction. And the parts of the brain involved in motor control lose cells over time.
Researchers found that the brain's response time begins to decline at age 24. The descent is a slow, but nonetheless, steady one.
B. Because virus need the hosts dna to multiply
Answer:
Y- x+ Y-
Explanation:
when an atom loses electrons the atom the result is a positive ion. when an atom gains an electron, the result is a negative ion
