A cyst formed by a protist functions ________.
A. as a protective mechanism against adverse changes in the environment and in transfer from one host to the next
B. in repair of damage to the cell envelope
C. in transfer from one host to the next
D. as a protective mechanism against adverse changes in the environment
Answer: A
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A map unit is based on a recombination frequency of:
1.1% 2.5% 3.10% 4.25% 5.50%
In a __________, water or some nutrient moves from
an environmental reservoir, through organisms, then back to the environment. Fill in the blank(s) with the appropriate word(s).
The statement "The virulence of many pathogens in humans may not be a target of selection itself, but rather an accidental by-product of selection on other traits" describes ________
A) the coincidental evolution hypothesis B) the shortsighted evolution hypothesis C) the trade-off hypothesis D) the energy-balance hypothesis
In what way are tapeworms and beardworms similar to each other?
a. They are both gutless. b. They both have long guts. c. They both have guts shorter than usual. d. They both have guts longer than usual.