Nutritional Adaptations of Plants

Free Response

Why is biological nitrogen fixation an environmentally friendly way of fertilizing plants?

Hint:

Because it is natural and does not require use of a nonrenewable resource, such as natural gas.

What is the main difference, from an energy point of view, between photosynthesis and biological nitrogen fixation?

Hint:

Photosynthesis harvests and stores energy, whereas biological nitrogen fixation requires energy.

Why is a root nodule a nutritional adaptation of a plant?

Hint:

A nodule results from the symbiosis between a plant and bacterium. Within nodules, the process of nitrogen fixation allows the plant to obtain nitrogen from the air.