Soil only contains abiotic materials.

Producers are the only organisms that can convert...

Most microbes are beneficial and are not harmful.

Biomass is the mass of each organism that travels to the next trophic level.

A sequence of organisms with each one serving as a source of nutrients or energy for the next organism.

Plant 10,000 kcal --> pri. consumer 1,00 kcal --> sec. consumer 100 kcal --> tert. consumer 10 kcal is an example of...

Net primary productivity (NPP) is the rate at which producers go through photosynthesis minus aerobic respiration.

Most of the precipitation on terrestrial ecosystems immediately becomes...

The only nutrient cycle that does not cycle through the atmosphere is...