_____ Cooperation is common among microorganisms living in microhabitats.

The definitive host for Plasmodium vivax is

a. Human

b. Anopheles

c. A sporocyte

d. A gametocyte

Define symbiosis. Differentiate commensalism, mutualism, and parasitism, and give an example of each.

What best describes the relationship between host and pathogen?

a. Mutualism

b. Parasitism

c. Commensalism

d. Endosymbiosis

First label the following diseases as bacterial, viral, or protozoan, and then indicate which ones are vectorborne infections: dengue fever, AIDS, chikungunya, Lyme disease, malaria.

Bacteria that convert nitrogen gas into ammonia are:

a. Nitrifying bacteria

b. Nitrogenous

c. Nitrogen fixers

d. Nitrification bacteria

In which type of symbiosis do both members benefit from their interaction?

a. Mutualism

b. Parasitism

c. Commensalism

d. Pathogenesis

For each of the following statements that is true, write “true” in the blank. For each statement that is false, write the word(s) that should be substituted for the underlined word(s) to make the statement correct.

__________ Most cyanobacteria form heterocysts in which nitrogen fixation occurs.

List four types of symbiotic relationships, and give an example of each.