How do new viruses arise?
a) mutation of existing viruses
b) not taking all your antibiotics
c) spread to new host species
d) all of the above
e) only a and c
Answer: e) only a and c
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Which variables are considered in a region's climate? a. All of these choices
b. Cloud cover c. Temperature d. Wind speed e. Humidity
If one strand of a DNA molecule read
ACCTTGAC, what would the other side read?
a. ACCTTGAC b. TGGAACTG c. GTTCCAGT d. CAAGGTGA e. none of these
What are the products of one turn of the Citric acid cycle?
A. 2 CO2, 3 NADH, 1 FADH2, 1 ATP B. 1 CO2, 2 NADH, 1 FADH2, 1 ATP C. 4 CO2, 6 NADH, 2 FADH2, 2 ATP D. 2 CO2, 6 NADH, 2 FADH2, 2 ATP E. 4 CO2, 12 NADH, 4 FADH2, 4 ATP
The fossil record suggests that whales ________
A) are descended from one branch of marine reptiles B) are closely related to land mammals such as pigs, hippos, and cows C) are not closely related to dolphins and porpoises, despite a superficial similarity D) once had well-developed hind flippers