Explain how energy flows through an ecosystem from the perspective of trophic levels.

The term “phylogeny” refers to

Which of these is an example of a density-dependent factor?

Decomposers play no role in energy flow through ecosystems.

A population is defined as a group of individuals of the same species living in the same area at the same time.

Carrying capacity (K) represents the maximum population size that a particular environment can support.

Biogeography helps explain

A keystone species has a disproportionately large effect on its environment relative to its abundance.

Homologous structures in different species suggest

Natural selection always leads to an increase in the complexity of organisms.