11B-Investigate and analyze how organisms, populations, and communities respond to external factors
11D-Describe how events and processes that occur during ecological succession can change populations and species diversity
12A-Interpret relationships, including predation, parasitism, commensalism, mutualism, and competition among organisms
12B-Compare variations and adaptations of organisms in different ecosystems
12D-Recognize that long-term survival of species is dependent on changing resource bases that are limited
12F-Describe how environmental change can impact ecosystem stability