Oogenesis differs from spermatogenesis in ________
A) the size of gametes produced B) when it is completed
C) the number of functional gametes produced D) All of the above are true.
Answer: D
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Viruses infecting ________ are typically the easiest to grow in the laboratory
A) plants B) animals C) fungi D) prokaryotes
The chorionic villi eventually form the placenta, a disc-shaped structure that ____
a. releases sex hormones at appropriate times throughout pregnancy b. initiates uterine contractions c. binds to the zygote to accelerate organ development d. nourishes the embryo throughout pregnancy e. prevents infection by blocking the passage of microorganisms through the cervix during pregnancy
The oral contraceptive pill contains ____
a. estrogen only b. estrogen and/or progestin c. estrogen and FSH d. FSH and progestin e. estrogen, progestin, and FSH
The nictitating membrane of sharks is used to:
a. protect the gills. b. line the mouth. c. enclose the internal organs. d. detect smells. e. cover the eye.