Exam 20: The Diversity of Prokaryotes and Viruses

Which of the following is the dreaded ʺblack deathʺ bacterium?

Through which process do bacteria recycle nutrients in the environment?

A particle that lacks all organelles and must always reproduce as an intracellular parasite is a(n)__________ .

Nitrogen-fixing bacteria remove nitrogen from plants and return it to the soil.

Which virus attacks white blood cells?

Viruses contain both DNA and RNA.

Bioremediation is the process in which bacteria digest plants and release oily toxins.

Which of the following causes AIDS (acquired immune deficiency syndrome)?

Lyme disease is caused by

The organism in the figure parasitizes

The nodules in the figure are

Unlike aerobic prokaryotes, anaerobic prokaryotes can obtain energy when__________ is not available.

Are viruses alive or not? Explain your reasoning.)

In bacteria, the small, circular pieces of DNA that are located outside the chromosome are called

Anaerobic bacteria require high levels of oxygen to survive.

What do the sticky layers of protective slime produced by some bacteria enable them to do?

Briefly explain how the classification of prokaryotes has changed in recent years due to new technological advances.

Legumes obtain a useful form of__________ from bacteria that live in root nodules.

The bacterium in the figure contains a(n)

Cyanobacteria are__________ prokaryotes.