Angina is best defined as

Which term best describes the process where one species benefits at the expense of another?

A climax community is

The principle of parsimony in phylogeny construction suggests

The amount of energy transferred from one trophic level to the next is approximately 100%.

Allopatric speciation requires geographic isolation.

The concept of “survival of the fittest” is associated with:

A scientific theory, like evolution, 

In the Linnaean system, species is the most inclusive (broad) taxonomic rank.

Succession refers to the predictable change in species composition over time in an ecosystem.