Does the ability of a Mycobacterium tuberculosis cell to infect a new host depend on its drug-resistant phenotype?
A. Yes, drug-susceptible cells can infect a new host more easily than drug-resistant cells.
B. Yes, drug-resistant cells can infect a new host more easily than drug-susceptible cells.
C. No, drug-susceptible cells and drug-resistant cells are equally likely to infect a new host.
Answer: C. No, drug-susceptible cells and drug-resistant cells are equally likely to infect a new host.
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Competitive exclusion is based on the idea that:
a. one species will voluntarily allow the other to survive b. no two species can completely occupy the same niche c. the larger species will always dominate the smaller d. competition is overrated as a factor in species survival e. two species can live together if they share the same niche but use it at different times
Describe the macroscopic anatomy of the human excretory system
What will be an ideal response?
The relationship between reef-building coral animals and zooxanthellae is classified as:
a. mutualism. b. commensalism. c. Batesian mimicry. d. parasitism. e. character displacement.
Pepsin converts ____ to ____
a. starch; sugars b. proteins; peptides c. fats; fatty acids and glycerol d. nucleic acids; nucleotides e. peptides; amino acids