Chemicals that are synthetic rather than naturally occurring are called
a. xenobiotic.
b. cometabolic.
c. polyhydroxyalkanoates.
d. pseudobiotics.
Answer: A
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Which of the following traits does the fossil above
share with modern birds? a. long,clawed fingers on each forelimb b. teeth c. feathers d. a long bony tail e. all of the above
A color-blind man and a woman with normal vision whose father was color blind have a son. Color
blindness, in this case, is caused by an X-linked recessive gene. If only the male offspring are considered, the probability that their son is color-blind is a. 25 percent. b. 50 percent. c. 75 percent. d. 100 percent. e. 0 percent.
The light reactions of photosynthesis can occur in the day and night.
a. true b. false
Please match the clinical stage of infection with its description.
Decline of symptoms and return to a state of health A) Prodromal stage B) Period of invasion C) Convalescent period D) Incubation period