Staphylococcus epidermidis cause pyogenic infections of intravenous catheter sites and prosthetic devices
a. true
b. false
Ans: a. true
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How do endophytes differ from endomycorrhizal fungi?
A. Endophytes live within leaves, whereas endomycorrhizal fungi live within roots. B. Endomycorrhizal fungi are beneficial to the plant, whereas endophytes are harmful. C. Endophytes are unicellular, whereas endomycorrhizal fungi are multicellular. D. Endophytes help plants absorb nutrients, whereas endomycorrhizal fungi help plants defend against predators and pathogens. E. Endophytes penetrate into plant cells, whereas endomycorrhizal fungi live within and between plant cell walls.
Plain soap is very effective in controlling spread of microorganisms because it is
A. bacteriostatic. B. very effective at the mechanical removal of microorganisms. C. virucidal. D. bactericidal.
For each species, all _____ in the complete set of chromosomes is the _____
a. genomes; phenotype b. DNA; genome c. mRNA; start of cDNA d. cDNA; start of mRNA
The secretion of which hormone decreases when calcium blood levels increase?
a. calcitonin b. parathyroid hormone c. thyroid hormone d. epinephrine e. norepinephrine