When Legumes with Nitrogen-Fixation Nodules Are Given Chemical Fertilizers with High

question 43

Multiple Choice

When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations,they abandon support of the nodules and end the symbiosis.Why?

• A)The mineral nutrients inhibit nitrogenase activity.
• B)Nitrogen gas is no longer available in the soil.
• C)The plant can conserve valuable energy sources by terminating the symbiotic relationship.
• D)The dissolved chemical nutrients are toxic to Rhizobium bacteria.
• E)Dissolved nitrogen uncurls the root hairs,releasing the nodule.

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Definitions:

Imaginary Audience

A belief of adolescents that they are or will be the focus of attention in social situations and that others will be as critical or approving as they are of themselves.

Naive Idealism

A cognitive development stage often observed in young adults and teenagers, characterized by the belief in the perfectibility of humans and society, sometimes without a practical understanding of the complexities involved.

Imaginary Audience

The belief, particularly common during adolescence, that one is constantly being watched and judged by others.