1. describe the structure and function of the cell wall of a plant cell. 2. The nucleus is a round, double - walled structure often found in the center of both plant and animal cells. What are the TWO primary function of the nucleus?
Please answer as quick as possible.

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.