Polyphagous parasites feed on

A. any plant species.
B. a single host species.
C. many different host species.
D. ectoparasites.
E. parasitoids.


C. many different host species.

Biology & Microbiology

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The type strain is the most representative strain of a particular species.

Answer the following statement true (T) or false (F)

Biology & Microbiology

The major structural component of bacterial cell walls is

a. cellulose. b. chitin. c. proteoglycan. d. peptidoglycan. e. arabinogalactan.

Biology & Microbiology

Of the three plants measured in the figure, which requires water to allow sperm to swim to the egg?


A. shrubs
B. All of the plant groups rely on sperm swimming to the egg in water.
D. None of the plant groups relies on sperm swimming to the egg in water.
D. mosses
E. herbs

Biology & Microbiology

Once the threshold potential of a nerve impulse

is acheived

a. an action potential may occur or it may not. b. an action potential will occur. c. sodium ions close. d. the resting potential immediately follows. e. none of these will happen.

Biology & Microbiology