New mothers may benefit from the aid of lactation consultants when learning to breastfeed. These consultants give advice on technique, and help the mother to feel relaxed and confident. What hormone is associated with calm, warm emotions and is also critical for the milk let-down reflex?
A. prolactin
B. estradiol
C. oxytocin
D. mammotropin
C. oxytocin
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Which would be the best way to directly test the hypothesis that
C. stellatus (a species of barnacle) is competitively excluded from the lower intertidal zone by B. balanoides (another species of barnacle)? A) Place individuals of each species in a jar and see which species survives. B) Remove all B. balanoides from the lower intertidal zone. C) Transplant B. balanoides to the upper intertidal zone. D) Clear rocks in an entire area and document recolonization events. E) Remove all C. stellatus from the upper tidal zone.
Aneuploidy describes all of the following except
a. Turner syndrome. b. Klinefelter syndrome. c. translocation. d. XYY. e. Down syndrome.
Microbial resistance resulting from mutation occurs because
A. bacterial genomes undergo mutation often. B. short generation times accumulate mutations in populations. C. bacterial genomes undergo mutation rapidly. D. mutations are passed between organisms. E. All of the choices are correct.
What should be recorded on a cash control sheet?