Shortly before the midpoint of the menstrual cycle, estrogen from the mature follicle triggers a surge in LH, which stimulates which one of the following events?
A) cervix dilation
B) uterus contractions
C) inhibition of FSH release
D) downward movement of fimbriae
E) ovulation
E
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Which of the following correctly matches the name of a biological clock to the timescale at which it operates OR the type of activity with which it might be associated?
A. annual: tides B. circadian: periodical cicadas C. lunar: feeding, sleeping D. circadian: feeding, sleeping E. lunar: days or years
Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
What will be an ideal response?
Evidence that black walnut trees exhibit allelopathy includes
A. the lack of vegetation growing under black walnut trees. B. the death of hornworms that try to eat black walnut leaves. C. the symbiotic relationship the trees have with fungi. D. the ants that protect the trees from herbivory. E. the morphological changes that occur in response to pathogenic attacks.
Sunlight resets biological clocks in plants by activating and inactivating _____
a. phototropins c. photoperiodisms b. phytochromes d. far-red light