is an increase in the number of phytoplankton in an aquatic ecosystem is always beneficial.

wegner's theory did not explain how the continents could move

explanation:

in addition to being able to metabolize, grow, digest food, and excrete wastes, what other functions must an organism perform if it is to survive? survival also depends on the ability to maintain one's boundaries, to move, to respond to stimuli, and to reproduce. oxygen is a survival need.