What plays a key role in stimulating appetite and enabling us to taste food

taste bud is the one that stimulate appetite and enable us to taste

Explanation:

because without the taste bud, we won't know that a particular food contain ions, acids and base

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.