Most incoming information is held for a fraction of a second and then passed to short-term memory by

Virtually all the energy in almost all ecosystems has its initial origin from _____

The use of a molecular clock (comparing changes in the sequences of DNA between species) ______

Competition between two different species is an example of a __________ interaction.

It is extremely important that you as a human being, and as a member of one of the richest nations on the planet, participate in providing creative solutions to the severe environmental and ecological challenges facing our species over the coming century.

The concept of trophic structure emphasizes the _______

Habitat loss is the least important of the environmental problems this century.

Probably the most important factor/s affecting the distribution of biomes is/are ______

A community ecologist would most likely be concerned with ______

A keystone predator is an organism that by predation increases competition in a community thereby allowing a higher species richness and species diversity.