Which of the following is the best example of a pioneer species?
a. lichens growing on rocks after a volcanic eruption
b. grasses growing after a forest fire
c. oak trees replacing pine trees in a forest
d. small mammals moving into a grassland

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

What is the difference between bacterial infections and viral infections?

Number and variety of living organism; includes genetic, species, and ecological types