which of the following is abiotic? course hero

Why is the nitrogen cycle important?

important because nitrogen: a) is a greenhouse gas. b) is an essential part of biological molecules such as proteins and nucleic acids (DNA) c) is the most toxic element to living organisms.

What are the roles of bacteria in the sulfur cycle?

a) Bacteria play little or no role in the sulfur cycle.

Do sedimentary rocks contribute to the sulfur cycle?

e) Sedimentary rocks and erosion do not contribute to the sulfur cycle.

When modeling a trophic structure in a region of great biodiversity, the terms producer and primary consumer are interchange?

When modeling a trophic structure in a region of great biodiversity, the terms producer and primary consumer are interchangeable as long as the organisms both produce and consume biomass.

What is the main cause of declining biodiversity?

Habitat destruction, and thus habitat fragmentation , is the major cause of declining biodiversity; the second major cause is __________.

What is the study of populations in relation to the environment?

The study of populations in relation to the environment, including environmental influences on population density and distribution, age structure, and variations in population size.

Is there insufficient energy to support more trophic levels?

There is insufficient energy to support more trophic levels.