Methane hydrates found at the bottom of the ocean ________.
A. float to the surface where they are consumed by methylotrophs
B. vastly exceed in amount the world's current known natural gas reserves
C. are only formed in areas of thermal heating
D. All of the choices are correct.
Answer: B
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A woman who is a carrier for DMD marries a man who does not have the disease. What is the
probability that they will have a boy with DMD?
a. 0 percent b. 25 percent c. 50 percent d. 100 percent
Which of the following are adaptations to land of both gymnosperms and angiosperms but are lacking in ferns and mosses?
a. pollen and seeds b. fruits and flowers c. vascular system d. true roots, stems, and leaves e. spores
According to the accompanying figure, global warming would result from an increase in which of the labeled components?
a. 1 and 2
b. 2
c. 2 and 3
d. 3
e. 4
A medium containing known substances in precise amounts is known as a ________ media.
A) selective B) complex C) natural D) defined