Bacteria are able to undergo nitrogen fixation to change nitrogen gas into a form that can be used by plants.

One way bacteria are important to the earth and its ecosystems is that a. bacteria use oxygen. b. bacteria produce acetone. c. bacteria decompose dead organisms. d. bacteria concentrate valuable minerals.

In meiosis, one blank cell divides to make four blank cells

Discuss how paleontologists use relative and radiometric dating to support the geologic time scale

Earth is the only planet with a wide variety of life because of it's? A. Size and shape. B. Closeness to the sun. C. Moderate temperature and liquid water.

Explain how a dog meets all of the characteristics of life

Ducks and beavers both have webbed feet

What is the term for brief episodes of neurologic deficit caused by temporary interference with blood supply to the brain?

Which of these celestial bodies has a tail? a-asteroid b-comet c-moon d-planet

What is the function of myeloma cells used in the production of monoclonal antibodies?

Describe a simple nervous system. Give an example of an organism that has a simple nervous system.