Which of the following is an important difference between reptiles and amphibians?
a. limbs
b. amniotic egg
c. a head
d. jaws
e. vertebrae
Answer: b. amniotic egg
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In order to express eukaryotic genes in a bacterium, the ________ must first be removed.
A. enhancers B. introns C. exons D. 3' poly A sequence
In reabsorption
a. plasma proteins are returned to the blood. b. excess hydrogen ions are removed from the blood. c. excess water is passed on to the urine. d. nutrients and ions are selectively returned to the blood. e. drugs and foreign substances are passed into the urine
The major purpose of the cool-down is to lower the body temperature to minimize the risk of central nervous system damage.
a. true b. false
Which of the following is TRUE of spirochetes?
A. they are peritrichous. B. they are Gram-positive. C. they are able to penetrate a host's tissues. D. they are obligate intracellular organisms. E. they are pleomorphic.