Xylem consists of which cells?
a. tracheids only
b. sieve elements only
c. vessel elements only
d. sclerenchyma fibers and sieve elements
e. tracheids and vessel elements
e
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Competitive exclusion is based on the idea that
a. one species will hold some sort of advantage over the other one. b. no two species can completely occupy the same niche. c. the more two species overlap in their capacity to obtain and use resources the less likely they are to coexist. d. all of these are true. e. none of these are true
Broad-spectrum drugs that disrupt the body's normal biota often cause ________.
A. drug toxicity B. allergic reactions C. nephrotoxicity D. superinfections
What are the results of nondisjunction, and why are these chromosome alterations so detrimental to an individual?
What will be an ideal response?
The broth dilution test can provide information for determining
A) the molecular target of an antibiotic. B) the MIC (minimum inhibitor concentration). C) the rate of diffusion of an antibiotic. D) the MBC (minimum bactericidal concentration), with an additional step. E) both the MIC and the MBC (with an additional step).