Answer:
Ion
Explanation:
An Ion is exactly as stated it bears either a positive or negative charge.
Well, since its about it needing to survive and reproduce in a specific environment, it should be fitness.
Answer:
B. Two racehorses with desirable traits are bred to produce a superior racing horse.
Explanation:
Artificial selection is also called selective breeding. In artificial selection, two organisms having desirable characters are allowed to breed with each other in order to produce a specie having good characteristics or better from their parents in many ways. For example, two racehorses which contains desirable traits are allowed to breed to produce a better horse.
(D) Lymphatic system
(I think lol)
One of the Lymphatic systems major jobs is to collect extra lymph fluid from body tissues and return it back to the blood.
Explanation:
The rough ER, studded with millions of membrane bound ribosomes, is involved with the production, folding, quality control and despatch of some proteins. Smooth ER is largely associated with lipid (fat) manufacture and metabolism and steroid production hormone production.