The transition from the gametophyte into the sporophyte generation occurs at the point in Figure 27-2 labeled:
a. 1.
b. 4.
c. 6.
d. 8.
e. 9.
B
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Which of the following animals use positive pressure breathing to ventilate its lungs?
a. a bird b. a frog c. a dog d. a reptile e. a human
Which of the following is NOT true concerning umbilical arteries?
a. There are two of them. b. They carry oxygen-poor blood. c. They take blood from the fetus to the placenta. d. They are housed in the umbilical cord. e. They carry blood that is rich in nutrients.
All of the following are trie about the prokaryotic outer membrane EXCEPT
a. it contains porins b. it is found only in gram negative bacteria c. it is composed of a phospholipid bilayer d. it contains a toxic component e. it contains a lipopolysaccharide
Archbishop James Usher calculated the age of Earth based on the Old Testament. He estimated that the crea-tion of the world took place:
a. on exactly October 23, 4004 B.C. b. in 3998 B.C. c. between 75,000 and 2–3 million years ago. d. an inconceivably long time ago.