At the Hubbard Brook Experimental Forest Stream Nitrogen Has Decreased

question 28

Multiple Choice

At the Hubbard Brook Experimental Forest stream nitrogen has decreased because of

• A) decreased atmospheric nitrogen.
• B) disturbance of the vegetation by a hurricane.
• C) increased microbial denitrification.
• D) increased immobilization of nitrogen in soil.
• E) none of the above

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Definitions:

Sperm

The male sex cell.

Ovum

The female reproductive cell or egg, which when fertilized by a sperm, can develop into a new organism.

Prenatal Development

The process of growth and development within the womb from conception to birth, including the development of organs and structures of the fetus.

Embryonic

Pertaining to the earliest stage of development in living organisms after fertilization, characterized by rapid cell division and differentiation.