Answer:
A hair follicle anchors each hair into the skin.
Explanation:
The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life.
Reactants? The chemicals needed to start a chemical reaction.
Answer:
B
Explanation:
<em>The correct answer would be that when sticklebacks don't use their armor, it shrinks. Then they pass lighter armor to their offspring.</em>
According to the theory of natural selection, adaptive traits that enable organisms to survive in an environment are selected by the forces of natural selection.
<u>When a particular trait is not needed for survival in an environment, the trait gradually degenerates within the population as natural selection ignores the existence of such trait. The degenerated trait is inherited by the subsequent generations of the population.</u>
The mechanism is also consistent with the law of use and disuse of organs by Jean Larmack.
The correct option is B.
