It was concluded that the fossil Dorudon atrox
was related to both whales and modern
artiodactyls because it had a whalelike skull
and
a. whalelike ankle bones.
b. artiodactyl-like ankle bones.
c. whalelike flippers.
d. artiodactyl-like flippers.
e. more than one of these
B
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Which of the following is a property of all living organisms?
a. Must “fit” their environment. b. Use the sun to fuel cellular respiration. c. Grow and develop based on inherited proteins. d. Regulate a constant internal body temperature.
All of the following statements are true about restriction enzymes EXCEPT
A. hundreds of different ones have been isolated and purified. B. they are made by bacteria and viruses. C. each enzyme cuts DNA at a different specific base sequence. D. they produce single-stranded complementary ends that can join to two different DNA strands by complementary base-pairing.
The following organisms can incorporate nitrogen directly from the atmosphere into their bodies:
What will be an ideal response?
The islets of Langerhans located in the ________ secrete both insulin and glucagon.
A. pituitary B. liver C. kidney D. hypothalamus E. pancreas