In population ecology, a population is best defined as a group composed of individuals of which of the following?

• A. Different species interacting with their abiotic environment in one area
• B. The same species living in the same area at the same time
• C. The same species living in different ecosystems across a continent
• D. Different species living in the same area at the same time

Answer: (B)

Verified step by step guidance

1. Understand the definition of a population in ecology: it refers to a group of individuals that belong to the same species.
2. Recognize that these individuals must live in the same geographic area to be considered a population, as this allows for interaction and potential interbreeding.
3. Note that the population is defined at a specific point in time, meaning the individuals coexist simultaneously.
4. Distinguish a population from a community, which includes different species living together, and from an ecosystem, which includes both living organisms and their abiotic environment.
5. Conclude that the correct definition of a population is 'the same species living in the same area at the same time.'