A cell is round and cannot produce its own food. Which organelle does this cell have? A. cell wall
B. central vacuole
C. chloroplast
D. plasma membrane

I decided that B and C were incorrect since they contribute to helping with making food. My final answer was plasma. Would that be correct?

as I think a plant cell can produce there own food so we should separate organelles which are found in the plant with that of the animal so cell wall , chloroplast and plasma membrane are characterstics of plant finaly the answer should be centeral vacoule which is the animal organelle

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.