Define the term population.

Explanation

**Step-by-Step Solution:**

1. **Understanding Biological Organization**: Begin by recognizing the levels of biological organization. It starts from macromolecules, which form cells, then tissues, organs, organ systems, and finally individual organisms.

2. **Defining Population**: A population is defined as a group of individuals of the same species that live in a specific area at the same time. This means that all the members of a population share a common environment and can potentially interbreed.

3. **Characteristics of a Population**: Populations can consist of various types of organisms, including plants or animals. They are characterized by their size, density, distribution, and age structure.

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