Explain how the structure of grass pollen may differ from the pollen of a rose

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

What is the problem in this article? what solution does the article propose?

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give