Forensic biologist Warren is examining a substance found at a crime scene. Using a chemical test, he determines that glycogen is present in the substance. What does this mean for his investigation

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