Florida Biology EOC Practice Test 2026 - Free Biology End-of-Course Practice Questions and Study Guide

Biodiversity is primarily concerned with the variety of life within a particular habitat, which is most accurately reflected by the number of different species present in that ecosystem. A greater number of species indicates a more complex and stable ecosystem, often contributing to higher resilience against environmental changes and disturbances. The presence of diverse species can include a range of plants, animals, fungi, and microorganisms, each playing unique roles within their habitat.

While the presence of only native species (which may be an aspect of biodiversity), the overall size of the habitat, and historical climate patterns can influence biodiversity, they do not directly define it. Native species are important for maintaining ecosystem balance, but biodiversity also encompasses introduced species that contribute to the ecosystem. The size of the habitat can support more species, but it’s the actual number of species that reflects biodiversity. Climate patterns can affect which species can thrive in an area, but they do not directly relate to the number of species currently present. Therefore, the number of species present in an ecosystem is the most accurate representation of biodiversity.