Osmoreceptors help the body deal with dehydration in part by stimulating release of ____
a. atrial natriuretic factor
b. renin
c. aldosterone
d. antidiuretic hormone
e. angiotensin
ANSWER: d
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The organ that is responsible for secreting cocoons in the oligochaetes is known as the
A. nephridia. B. setae. C. radula. D. clitellum. E. lophophore.
The test described here is a recombination test. Answer with TRUE or FALSE.
Shown below are the maps of a series of rII- deletion strains (1–5). The deleted region is indicated as (......) and the intact region as ______.
1 ___________(...........)_______________
2 _________________(...........)_________
3 (.....................)_____________________
4 ________________________(................)
5 _____(..........)______________________
rII- phage strains A-E have point mutations in the rII region. E.coli K(?) cells are coinfected with one phage that has a deletion and one phage that has a point mutation. The presence of wild-type progeny phage is assessed by the presence (+) or absence (o) of plaques.
All of the members of the same species occupying the same area at the same time constitute:a
an individual. b. a population. c. a community. d. an ecosystem. e. a biosphere.
Red-green color blindness is inherited as a sex-linked recessive trait. The gene is found on the X chromosome. Can a man with normal color vision father a daughter who is red-green color-blind?
A) Yes, if the woman with whom he mates is red-green color-blind. B) Yes, if the man is heterozygous for red-green color blindness. C) No, he can't (unless there is a mutation). D) No, the expression of the trait skips a generation.