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Semelparous species typically invest _______ into the production of _______ offpring.


A) an enormous amount of energy; a large number
B) an enormous amount of energy; a small number
C) a comparatively small amount of energy; a large number
D) a comparatively small amount of energy; a small number

E) A) and C)
F) None of the above

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In human males, the scrotum


A) maintains the testes at 35°C, the optimum temperature for viable sperm.
B) provides for the production of all the supporting fluids in semen.
C) maintains the testes at 39°C, the optimum temperature for viable sperm.
D) prevents the testes from entering the body cavity.

E) A) and B)
F) A) and C)

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Refer to the figure shown. Refer to the figure shown.   Which conclusion can be drawn from the information in the figure? A)  Populations at high latitudes reproduce during just 1-2 months. B)  High latitude populations breed all year long. C)  Populations at high latitudes show greater fecundity compared to populations at mid-latitudes. D)  Populations at high latitudes reproduce over a period of many months. Which conclusion can be drawn from the information in the figure?


A) Populations at high latitudes reproduce during just 1-2 months.
B) High latitude populations breed all year long.
C) Populations at high latitudes show greater fecundity compared to populations at mid-latitudes.
D) Populations at high latitudes reproduce over a period of many months.

E) All of the above
F) A) and D)

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During the birthing process, the release of _______ results in myometrial muscle contractions.


A) estrogen
B) progesterone
C) oxytocin
D) prolactin

E) B) and D)
F) A) and D)

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During the birthing process, a _______ feedback loop maintains high levels of oxytocin, a hormone that stimulates smooth muscle, until _______ occurs.


A) positive; parturition
B) positive; uterine contraction
C) negative; parturition
D) negative; uterine contraction

E) A) and B)
F) C) and D)

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How can global warming desynchronize 2 species with synchronized reproductive cycles?


A) Temperature will accelerate photoperiod cues differently.
B) If one species uses photoperiod cues and the other uses temperature.
C) Global warming typically does not affect reproductive cycles.
D) If one species is a mammal and the other is an amphibian.

E) None of the above
F) A) and B)

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The main structure maintaining the production of progesterone before initial implantation is the


A) chorion.
B) corpus luteum.
C) placenta.
D) zygote.

E) All of the above
F) C) and D)

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Refer to the figure shown. Refer to the figure shown.   What process is occurring at arrow III in the figure? A)  Ovulation B)  Estrous C)  Fertilization D)  Both ovulation and estrous What process is occurring at arrow III in the figure?


A) Ovulation
B) Estrous
C) Fertilization
D) Both ovulation and estrous

E) None of the above
F) A) and D)

Correct Answer

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