AP BIOLOGY

Detailed explanation-1: -Therefore an ecosystem having a climax community experiences the least change in species number over time, hence option d is correct.

Detailed explanation-2: -[ klī′măks′ ] An ecological community in which populations of plants or animals remain stable and exist in balance with each other and their environment. A climax community is the final stage of succession, remaining relatively unchanged until destroyed by an event such as fire or human interference.

Detailed explanation-3: -Ecosystems are organized to better understand the frame of reference in which they are being studied. They are organized from smallest to largest; organism, population, community, ecosystem.

Detailed explanation-4: -Succession is a structural change in a community and its nonliving environment over time. Community changes alter the ecosystem in ways that favor competitors, and species replace one another in a somewhat predictable manner until a stable community is reached.

Detailed explanation-5: -climax, in ecology, the final stage of biotic succession attainable by a plant community in an area under the environmental conditions present at a particular time.