____ are responsible for cell mediated immunity
a. Natural killer cells
b. Monocytes
c. T lymphocytes
d. B cells
e. Macrophages
c
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Chemical germicides
A. may react irreversibly with proteins/enzymes. B. may react with cytoplasmic membranes or viral envelopes. C. may be disinfecting or even sterilizing. D. are sensitive to dilution factor, time of contact, and temperature of use. E. All of the choices are true.
The __________ is responsible for the separation of the chromosomes during __________ of mitosis
a. cell wall; anaphase b. flagellum; metaphase c. mitotic spindle; anaphase d. kinetochore; prophase e. centromere; telophase
Nearsightedness and farsightedness are caused by the
A) density of the aqueous and vitreous humor. B) length of the eyeball. C) shape of the cornea. D) shape of the lens. E) positioning of the rods and cones.
Two different organisms CANNOT have the same scientific name.
a. true b. false