____ convert nitrogen gas to nitrogen that plants can use. 

A. Decomposers
B. Nitrogen-fixing bacteria
C. Nitrifying bacteria
D. Denitrifying bacteria


B. Nitrogen-fixing bacteria

Biology & Microbiology

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Which of the following structural features of epithelial tissues are related to the function of these cells? Epithelial cells _____

A) have polarity B) have a long life span C) have low rates of mitosis and cytokinesis D) are loosely packed

Biology & Microbiology

Of the following organisms, which has a unique developmental life cycle including a replicative form, the reticulate body (RB), and an extracellular, metabolically inert, infective form, the ele-mentary body (EB)?

a. Rickettsia b. Chlamydia c. Ehrlichia d. Coxiella

Biology & Microbiology

Discuss the reasons why cloning transgenic animals may be preferable over traditional breeding. What are some of the

problems with animal cloning?

What will be an ideal response?

Biology & Microbiology

The plural for genus is

a. genus. b. geni. c. genera. d. gena. e. genae.

Biology & Microbiology