Activity All life is made of cells, but all cells also have a shared history. Watch the video "Archaea and How DNA Began," and answer the questions that follow. Part A Using evidence from the video, describe three characteristics of life that Archaea bacteria have.

What is a population? a. all the members of the same species living in the same ecosystem at the same time b. the number of a species living in the same ecosystem over a period of time c. the total number of organisms living in an ecosystem at a point in time d. all the members of a food web in the same ecosystem