How many chromosomes should be in a generative cell nucleus?
A) 8
B) 16
C) 24
D) 32
A
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Identify the role of carbon dioxide in photosynthesis.
A. It is split to release electrons. B. It is split to become incorporated into sugars. C. It is a by-product of the Calvin cyle D. It is the final electron acceptor.
In a woman's monthly cycle, the hormone _____ is released when estrogen reaches a peak
a. luteinizing hormone b. oxytocin c. progesterone d. testosterone e. human chorionic gonadotrophin
The extraembryonic membrane that forms the majority of the placenta is the:
a. amnion b. allantois c. chorion d. yolk sac e. umbilical cord
Estrogens from birth control pills
a. are excreted in the urine. b. are removed during standard wastewater treatment. c. can cause female fish to develop male traits. d. have different effects in fish than those of industrial estrogen-mimicking pollutants. e. do none of these.