What characteristics are used to distinguish between different biomes?

What are chlorofluorocarbons made of

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Which best describes what you will do in the reaching your academic potential course?