Answer the following statements true (T) or false (F)
1. Damage to the seminal vesicles would prevent sperm from becoming motile.
2. Erectile dysfunction can be treated by drugs that increase levels of nitric oxide.
3. FSH stimulates the activity of Leydig cells and LH stimulates the activity of Sertoli cells.
4. A human female has the largest number of primary oocytes at the onset of puberty.
5. FSH secreted by the pituitary stimulates fluid secretion into the antrum of the follicle.
1. FALSE
2. TRUE
3. FALSE
4. FALSE
5. TRUE
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If blending inheritance was an accurate model of transmission genetics, which of the following would be true?
A. Variation in natural populations would remain the same over time. B. Variation in natural populations would increase over time. C. Variation in natural populations would decrease over time. D. Variation would increase in some populations, decrease in some populations, and remain the same in some populations. E. Mutation would not contribute to variation in natural populations.
The variable in the butterfly experiment is
a. butterfly wing pattern color. b. butterfly species. c. bird predator species. d. rainforest region used. e. percentage of survivors.
What type of animal can both donate and receive sperm?
A) one that reproduces asexually B) one that has only male gonads C) one that is called a hermaphrodite D) one that undergoes copulation
A digger wasp continues to close its nest even though the researcher has removed the nest's contents. This shows that nest-closing behavior in the digger wasp is
Select one: a. a learned behavior. b. an imprinted behavior. c. a fixed action pattern. d. an insight learning behavior. e. a classical conditioned behavior.