Which of the following events occurs during interphase?
a. formation of the spindle
b. alignment of chromosomes at the spindle midpoint
c. disappearance of the nuclear envelope
d. DNA synthesis
Answer: d. DNA synthesis
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Spontaneous generation _____
A) was demonstrated to occur under normal laboratory conditions by Pasteur B) apparently occurred at least onceâ€"when life on Earth began C) occurs every time a new species evolves from a preexisting species D) addresses the formation of new cells from existing cells
The gritty substance you may feel on your teeth
after using toothpaste is actually a. small deposits of sand. b. diatomaceous earth. c. cellulose from dinoflagellates. d. a synthetic abrasive. e. derived from foraminiferans.
Immunoglobulins inactivate microbes in all of the following ways EXCEPT via
A. binding toxins. B. perforating membranes or binding toxins. C. perforating the microbial cell membrane. D. linking microbes to complement proteins. E. opsonization.
Typhoid fever differs from salmonellosis in that in typhoid fever
A) the microorganisms multiply within macrophages. B) the incubation period is much longer. C) the symptoms are due to infection of the gallbladder. D) infection is spread only in the feces of domesticated animals. E) infection occurs due to ingestion of endospores.