Parturition is triggered by ____, causing the release of ____ and a ____ of oxytocin.
A. fetal CRH; fetal estrogen; positive feedback loop
B. fetal CRH; maternal estrogen; negative feedback loop
C. fetal CRH; maternal estrogen; positive feedback loop
D. maternal CRH; fetal estrogen; negative feedback loop
E. maternal CRH; maternal estrogen; positive feedback loop
Ans: C. fetal CRH; maternal estrogen; positive feedback loop
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Organisms that inhabit soil or water and breakdown and absorb the organic matter of dead organisms are called ________.
A. secondary consumers B. primary consumers C. autotrophs D. decomposers
A sequence of bases within a gene that does not code for protein is called a/n ________.
A. operon B. operator C. intron D. promoter E. exon
Which stage comes directly after interphase?
A. G1 B. cytokinesis C. S D. mitosis E. G2
Eating sashimi (uncooked fish) is a risk factor for infection with
A) Entamoeba histolytica. B) Taenia saginata. C) Giardia intestinalis. D) Enterobius vermicularis. E) Anisakis simplex.