If a population of termites were treated with a chemical that destroyed all of the trichonymphids living in their gut, what would be the most likely consequence?
A. The termites would die because they would not be able to digest cellulose in wood.
B. The individual termites would grow to be much larger.
C. The termites would be able reproduce more rapidly and their population would expand.
D. The termites would turn to alternative sources of nutrients.
Answer: A
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You mate two pea plants that are both AaBb and get a 3:1 phenotype ratio. This suggests
A. crossing-over occurred. B. independent assortment occurred. C. genes A and B are on different chromosomes. D. nondisjunction occurred. E. genes A and B are linked on the same chromosome.
The main regulator of the calcium level in the blood is
a. parathyroid hormone. b. thyroid hormone. c. thymosin. d. growth hormone. e. insulin.
The percent oxygen saturation of hemoglobin is highest in the:
a. tissues where oxygen concentration is lowest. b. tissues where oxygen concentration highest. c. venules where oxygen concentration lowest. d. pulmonary capillaries where oxygen concentration lowest. e. pulmonary capillaries where oxygen concentration highest.
Glycolysis generates more stored energy than it expends. What is the net number of activated carrier molecules produced in this process (number and type of molecules produced minus the number of those molecules used as input)?
(a) 6 ATP, 2 NADH (b) 4 ATP, 4 NADH (c) 2 ATP, 2 NADH (d) 4 ATP, 2 NADH