The early cell divisions of human development differ from other mitotic cell divisions in that:
A. cells do not replicate all chromosomes
prior to dividing; this helps the cells
differentiate.
B. cells do not grow in size; they subdivide
the cytoplasm of the fertilized egg.
C. cells move as they divide.
D. they are unequal; some daughter cells are
much larger than others.
E. All of these choices are correct.
B
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Viruses mutate, and some viruses have not been discovered.
Answer the following statement true (T) or false (F)
Rhythms that are repeated every 24 hours are
a. sleep movements. b. tropisms. c. physiological requirements. d. circadian rhythms. e. biological clocks
Which of the following hormones stimulates ovulation?
a. gonadotropin-releasing hormone b. luteinizing hormone c. follicle-stimulating hormone d. estrogen e. progesterone
The trade-off between investments in current reproduction and in growth that promotes future reproduction is referred to as the total cost of what?
A. Adaptation B. Selection C. Genetic change D. Reproduction E. Fitness