ANSWER ASAP!! Which type of selection occurs when a population experiences a shift in diversity toward the larger organisms? 1. stabilizing selection
2. directional selection
3. disruptive selection
4. adaptive selection

b. heterotroph

explanation:

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.