Which of the following nonpathogenic protozoa has a very large glycogen vacuole in its cyst form and measures approximately 5 to 20 µm in diameter?
a. E. coli
b. I. butschlii
c. E. dispar
d. E. nana
B
I. butschlii has a characteristically large glycogen vacuole in its cyst form. Although worldwide in distribution, it is a nonpathogenic amoeba.
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When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side, what happened to the seedling?
A. It bent away from the directional light. B. It did not respond to the directional light. C. It grew toward the light, as expected. D. It waved back and forth. E. It wilted and died.
The relationship between a pathogen and its host is best described as ____
Fill in the blank(s) with the appropriate word(s).
Generalist insect herbivores feed on more than one kind of plant. Typically, how many different families of plants do they feed on?
a. 2 b. 3 c. 5 d. More than 5
The most appropriate unit of measurement for intact archaea is the
A) meter (m). B) millimeter (mm). C) micrometer (?m). D) nanometer (nm). E) centimeter (cm).