Biological rhythms in animals isolated from light and dark cues _____
A) continue to have cycles of exactly twenty-four hours' duration
B) continue to have cycles of approximately twenty-four hours duration; some more rapid, some slower
C) synchronize activity with whatever lighting cycle is imposed on them
D) cease having any rhythms
B
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The ____ of the mammalian nephron receives the filtrate first
a. distal convoluted tubule b. Bowman's capsule c. descending segment of the loop of Henle d. proximal convoluted tubule e. ascending segment of the loop of Henle
Annual plants germinate, reproduce, and die in one season. Where do these plants often evolve?
A) deserts B) tundra C) deciduous forests D) chaparral
If a man with blood type A and a woman with blood type B produce an offspring, what might be the offspring's blood type?
A) A, B, or O B) AB only C) AB or O D) A, B, AB, or O
What factors stimulate uterine contractions and birth?
A. LH and prostaglandins B. Prolactin and prostaglandins C. hCG and prostaglandins D. FSH and prostaglandins E. Oxytocin and prostaglandins