What is a prion?
A. A highly wound circle of RNA
B. A virus that has not yet acquired its envelope
C. A protein that can alter the shape of a second protein
D. The protein associated with a latent virus
Ans: C. A protein that can alter the shape of a second protein
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Collar cells of sponges function in moving water through the sponge's body
Indicate whether the statement is true or false
Plasmopara viticola is best described as which of the following?
a. plant parasite b. human pathogen c. fungal infection d. beneficial protist
All animals capable of moving independently of the ocean currents are called ________.
Fill in the blank(s) with the appropriate word(s).
Dominant species tend to be more abundant than other species because they
A) prey upon or parasitize other species. B) outcompete other species. C) are preyed upon less than other species. D) reproduce more rapidly than other species.