Why Are Soil Microorganisms So Important to the Nitrogen Cycle

question 29

Essay

Why are soil microorganisms so important to the nitrogen cycle? Describe the 3 roles bacteria play in the nitrogen cycle.

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Definitions:

Intradermal Test

An allergy test in which dilute solutions of allergens are introduced into the skin of the inner forearm or upper back with a fine-gauge needle.

Subcutaneous Test

is a medical diagnostic procedure that involves injecting a substance just beneath the skin to test for an allergic or immune response.

Fine-Gauge Needle

A very thin needle used for injections, reducing discomfort and tissue damage.

Sigmoidoscopy

A procedure in which the interior of the sigmoid area of the large intestine, between the descending colon and the rectum, is examined with a sigmoidoscope, a lighted instrument with a magnifying lens.