Features that have been retained by reptiles from the time they replaced the amphibians as the dominant terrestrial vertebrates include all of the following, except
A. endothermy.
B. the amniotic egg.
C. reoriented appendages.
D. thoracic breathing.
E. dry skin.
Answer: A
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You are attempting to mutate lambda to affect whether lysis or lysogeny occurs after lambda infection. Which mutation would INCREASE the chances of LYSOGENY over lysis?
A) deletion or inactivation of the cI gene B) deletion or inactivation of the cro gene C) overexpression of the cro gene D) deletion of both the cro and cI genes
Which of the following is a terpene?
A) testosterone B) vitamin A C) glycerol D) phenanthrene E) dolichol
An example of natural passive immunity would be
A. chickenpox infection, followed by lifelong immunity. B. chickenpox vaccine triggering extended immunity to chickenpox. C. giving a person immune serum globulins to chickenpox virus after exposure to the disease. D. a fetus acquiring maternal IgG to the chickenpox virus across the placenta.
The belief that humans arose in sub-Saharan Africa and then moved out is which model of evolution?
a. classic b. retroactive c. multiregional d. migratory