Ecologists study the interaction of organisms at different levels. Which places the levels in order from smallest to largest?

Question

A.
population→ ecosystem→ organism→ biosphere→ community→ biome

B.
community→ biosphere → organism→ population→ biome→ ecosystem

C.
organism→ population→ community→ ecosystem→ biome→ biosphere

D.
biosphere→ ecosystem→ organism→ community→ biome→ population

Answer 1

The correct order of ecological levels from smallest to largest is:

C. organism → population → community → ecosystem → biome → biosphere

This sequence correctly reflects the hierarchy in ecology, starting with the individual organism, moving to groups of the same species (population), then to interactions between different species (community), followed by the interactions among communities and their environment (ecosystem), then larger regions with similar climates and ecosystems (biome), and finally the entire planet and its ecosystems (biosphere).