According to paragraph 1, which of the following factors limits the abilities of populations within an ecosystem to survive? A. The frequency of reproduction of each species
B. The number of organisms becomes too large
C. Availability of space, shelter, food, and water
D. Availability of a diversity of species

Which of the following claims does the author support the least

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

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?