The Sabin polio vaccine is a(n)
a) conjugated vaccine.
b) attenuated vaccine.
c) toxoid vaccine.
d) inactivated vaccine.
Ans: b) attenuated vaccine.
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If you were designing a new operation for temporary relief of poorly oxygenated tissues in one part of the thorax, you could try to bypass blood from what vessel to that tissue?
A. pulmonary vein B. superior vena cava C. pulmonary artery D. hepatic vein E. None of the answer choices is correct.
Biotic potential is controlled by all of the following
factors EXCEPT a. the age of individuals within the population. b. the resources available for each individual. c. fecundity rate. d. environmental disturbances. e. all of these control biotic potential.
The minimum age of the LUCA (last unique common ancestor) is the age of the oldest fossils that can be identified with certainty as close relatives of present-day prokaryotes and eukaryotes. Such fossils are about ________
A) 3.8 billion years old B) 2 billion years old C) 542 million years old D) 3.28 billion years old E) 65 million years old
An ancestor and all of its descendants are known as a monophyletic group or a(n) ________
A) apomorphy B) plesiomorphy C) synapomorphy D) clade