Exam 14: Prokaryotes, Protists, and Viruses

____ bacteria are found inside the roots of legumes, where they receive _____ from the host plant.

G. lamblia infection in the gut ____; therefore, some people may be benefited by the presence of this protist.

The earliest cells most likely ____.

Following infection of a white blood cells by the human immunodeficiency virus (HIV), viral reverse transcriptase produces a ____ copy of its RNA genome.

It is hypothesized that ____ may have been the first informational molecule.

____ are likely to provide hints about the Earth's early atmosphere.

Outbreaks of ____ in humans typically arise when a person comes in contact with an infected animal.

Humans acquire their first microorganisms during ____.

The appearance of _____ on Earth due to the action of photosynthetic bacteria occurred about 2.7 billion years ago.

What is the function of bacterial flagella?

DNA is more stable than RNA for storing genetic information because ____.

Prokaryotic cells are ____.

The close relationship between ____ and animals can be seen in the similarity of these protists and sponges, simple animals.

The pathway on the left is named for what is happening in the figure labeled with letter ____.

Red algae ____.

A ____ is a disease-causing organism.

____ may have been the ancestors of cellular life.

Dinoflagellates typically have ____; some photosynthetic species live inside coral cells, which they supply with _____.

A virus is most analogous to a(an) ____.

The ____ of flagellated protozoans are analogous to the ____ of prokaryotes.