In which type of population distribution would plot sampling be most accurate?
a. clumping
b. uniform
c. random
d. random and clumping
e. uniform and clumping
ANSWER: b
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Which statement is true regarding the pathogenesis of N. cinerea?
a. N. cinerea is a leading cause of fatal bac-terial meningitis. b. Virulence factors include pili, capsule formation, and endotoxin. c. Disseminated intravascular coagulation (DIC) and thrombocytopenia are compli-cations of infection. d. N. cinerea is commonly encountered as a contaminant in clinical specimens.
The cellular basis of muscular dystrophy is that some of a child's muscle cells
A) have combined into a structure that cannot contract. B) lack DNA. C) lack a protein that enables them to withstand the force of contraction. D) have too much of a contractile protein and become weak.
Nitrogen fixation converts _____ to _____
a. nitrogen gas; ammonia c. ammonia; nitrates b. nitrates; nitrites d. nitrites; nitrogen oxides
A well-tested hypothesis that has not been disproved
is called a a. principle. b. law. c. theory. d. fact. e. hypothesis.