In order to be considered infertile, how long must a couple go without achieving pregnancy despite regular unprotected intercourse?

A. 30 days
B. 3 years
C. 1 year
D. 6 months
E. 12 weeks


Answer: C

Biology & Microbiology

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External fertilization

A. occurs in amphibians. B. often leaves fertilized eggs susceptible to predation. C. involves the release of eggs and sperm into a body of water. D. requires specialized behavior. E. All of these statements are correct.

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The hormone __________ is indicated at “D.”

a. PRL b. LH c. oxytocin d. ADH e. TSH

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Separation of the sister chromatids is a characteristic of which stage of mitosis?

a) anaphase b) telophase c) metaphase d) prometaphase

Biology & Microbiology