Which of the following bacterial pathogens is found in aquatic environments and is commonly present in air conditioning systems?
A) Enterobacter aerogenes
B) Klebsiella pneumoniae
C) Legionella pneumophila
D) Vibrio cholerae
Answer: C
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Which of the following is least likely to be part of a cell membrane?
A) peptidoglycans B) phospholipids C) glycoproteins D) transport proteins E) enzymes
Assuming a normal number of autosomes, what would be the sex of the following: XXY mouse, XXY Drosophila?
What will be an ideal response?
Since a small change in the amount of nitrogen in the soil greatly affects plant growth, it is known as a(n)
A. biotic potential. B. limiting factor. C. intrinsic factor. D. mortality factor.
Secondary cell walls are stronger than primary cell walls because secondary cell walls contain
a. more pectin. b. less lignin. c. more chitin d. more lignin e. layers of cellulose fibrils at various orientations to one another.