Brushlike projections from the villi are
a. cilia.
b. flagella.
c. lymph vessels.
d. microvilli.
e. rugae.
D
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9. Earthworms exhibit segmentation, defined as the
(a) division of the body into a series of similar segments. (b) presence of a true coelom. (c) difference in size of the male and female. (d) presence of a “head” equipped with sensory organs.
The peripheral nervous system is composed of:
A. sensory neurons. B. cranial nerves. C. spinal nerves. D. All of the answer options are correct.
The discovery of sex-linked genes and production of the first chromosome map came from studies of
a. pea plants. b. corn. c. humans. d. fruit flies. e. mice.
Which of the following statements is FALSE
about cowbirds? a. Their host relationship is similar to cuckoos. b. They are insect-eaters. c. Females can lay thirty eggs in a season. d. Cowbird hatchlings are recognized as imposters by host parents. e. They now parasitize at least fifteen species of native North American birds