Calcitonin acts in opposition to
a. parathyroid hormone.
b. thyroxine.
c. glucagon.
d. the adrenal medulla.
e. osteoblast activity.
A
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Virus size is
a. 300 to 400 ?m. b. 10 to 400 mm. c. 10 to 200 cm. d. 10 to 400 nm. e. 300 to 400 mm.
Which of the following has a complex sort of sexual
reproduction called conjugation? a. ciliates b. Plasmodium c. trypanosomes d. slime molds e. euglenoids
A pregnant woman was told by her doctor that while she is pregnant she might want to let someone else care for her cats so she would not contract toxoplasmosis through which mechanism?
a. Cats may have fleas that transmit toxoplasmosis b. Scratches from infected claws c. Exposure to infected cat feces d. Infection from saliva e. Infection from mice the cat may bring into the house
If one reproductive strategy of a eukaryotic organism is gamete fusion, what can be concluded about that organism?
A. The organism participates in horizontal gene transfer. B. Progeny organisms are identical to each other. C. The organism participates in vertical gene transfer. D. The organism reproduces asexually.