How Is Atmospheric Nitrogen Converted to a Usable Form in the Biosphere

question 32

Multiple Choice

How is atmospheric nitrogen converted to a usable form in the biosphere?

• A)It is absorbed into plants via stomata and converted within the plant to a usable form.
• B)Atmospheric nitrogen is directly available to plants and animals.
• C)Bacteria within root nodules of legumes chemically combine the atmospheric nitrogen into nitrates and ammonia.
• D)Atmospheric nitrogen is completely unavailable to plants and animals and,as a result,synthetic fertilizers must be used.

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Definitions:

Electrical Impulses

Rapid signals transmitted along neurons, facilitating communication within the brain and between the brain and the rest of the body.

Sense Receptors

Specialized cells that convert physical energy in the environment or the body to electrical energy that can be transmitted as nerve impulses to the brain.

Stimulus Energy

The physical energy from the environment that impacts sensory organs, leading to perception.

Electromagnetic Energy

Refers to a form of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space.