Given the comparative study of embryology, it is concluded that genes controlling embryonic development are essentially the same.
a. true
b. false
Ans: a. true
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The movement of chemicals through ecosystems is known as
A. gross primary production. B. biogeochemical cycles. C. community ecology. D. net primary production. E. biomagnification.
How can predators influence the species richness and structure of communities?
a. Predators increase the carrying capacity of their prey. b. Predators destabilize competitive interactions among their prey. c. Predators increase the population sizes of pathogens. d. Predators increase the population sizes of their prey. e. Predators reduce the population sizes of their prey.
Each tapeworm proglottid contains:
a. sperm b. eggs c. cysts d. eggs and sperm e. a scolex
When the chromosome is most condensed, which
of the following is true? a. Proteins are used to wind up the DNA. b. They are less susceptible to radiation. c. Lipid droplets form “beads on a string.” d. Carbohydrates wind the DNA into clusters. e. None of these are true.