What event is the basis for cell communication?

Cells typically communicate using chemical signals, where one cell sends the signal, while other receive it (target cell). Cells communicate via signals, molecules that bind to their receptor on the target cell. The activity of the receptor is than changed, causing the intracellular cascade (a chain of chemical messengers inside the cell) that triggers a response.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .

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.