Energy and Biogeochemical Cycles

Front

What nutrient is not cycled through the atmosphere?

Back

Phosphorous.

Front

Define a Biogeochemical Cycle.

Back

The ways in which an element moves in the Biosphere.

Front

During which phase of the nitrogen cycle are nitrates taken up into plant roots?

Back

Assimilation.

Front

In a pyramid of energy, which level would most likely contain organisms that perform photosynthesis?

Back

The producer level (Level D).

Front

Which organism would have the least amount of biomass in an ecological biomass pyramid: a coyote, a rabbit, or grass?

Back

Coyote.

Front

What are the main components of the nitrogen cycle?

Back

Nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.

Front

What is the role of decomposers in biogeochemical cycles?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.

Front

Explain the process of nitrogen fixation.

Back

Nitrogen fixation is the conversion of atmospheric nitrogen (N2) into ammonia (NH3) or related compounds in soil, primarily by bacteria.

Front

What is the significance of the phosphorus cycle in ecosystems?

Back

The phosphorus cycle is crucial for DNA, RNA, and ATP production, affecting energy transfer and genetic information.

Front

How does energy flow through an ecosystem?

Back

Energy flows from producers to consumers and decomposers, typically in a one-way direction.