The set of conditions under which an organisms exists in nature

This is the study of classification?

The environmental factor closest to a tolerance limit for a given species, which is the most important in determining distribution at a given time.

In this form of asexual reproduction the organism develops small clones that eventually break off and become another organism?

This sort of sediment comes from land?

Which of these is a biological factor?

These organisms have a symbiotic relationship with corals?

When only a portion of the life of the plankton is spent in the plankton?

This is sand deposited by wind?

Multiple classes make up a ?