Question

2. An ecosystem pool that takes up (stores) more carbon than it releases is said to be what?

A) A carbon source

B) A carbon sink

C) Carbon neutral

D) None of the above

3. Nitrogen mineralization is the process by which:

A. producers take up soil nitrogen and incorporate it into their tissues.

B. primary consumers ingest producers in the soil and absorb or excrete nitrogen from their tissues.

C. soil microbes produce organic nitrogen compounds from inorganic soil nitrogen.

D. soil microbes break down organic nitrogen into inorganic nitrogen.

E. nitrogen waste products in the soil are converted to atmospheric nitrogen by soil microbes.

Answer 1

Q 2

Option B - A carbon sink

A carbon sink is an ecosystem pool that takes up more carbon than it releases. The carbon sink takes up more carbon from atmosphere and it is some what reduces the green house effect.

Q 3

Option D - Soil microbes produce organic nitrogen compounds from inorganic soil nitrogen

The micro-organisms present in the soil degrade the organic compounds and produce nitrogen which can be used by the plants.