The relationship between the human body and its microbiota:
a. is never beneficial to either
b. is an example of a symbiosis
c. is established before birth
d. usually leads to parasitism
b. is an example of a symbiosis
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Ionizing radiation can produce which of the following?
A. cytosine B. free radicals C. stop codons D. thymine dimers E. hypoxanthine
What is the result of meiosis?
a. 2 diploid cells b. 4 diploid cells c. 2 haploid cells d. 4 haploid cells e. 1 haploid cell
Activated thrombin makes this protein change
A) fibrinogen B) agglutinate C) plasmin D) prothrombin
The way that genetic material of a bacteriophage enters a bacterium is most like the way that
A) a drug is injected with a hypodermic needle. B) a person swallows a pill. C) skin lotion is rubbed onto the hands. D) water soaks into a sponge.