If an active volcano produced magma that eventually became igneous rock, geologists would assume that the processes producing this rock are the same as those processes that occurred millions of years ago. This assumption is referred to as

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