Directly above the midlatitudes, the tropopause (-57°C) occurs at approximately:
A) 1 km.
B) 13 km (8 mi.).
C) 50 km (30 mi.).
D) wherever +32°F is recorded as the temperature.
B
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Which of the following statements describes an isotope?
A. element with the same number of protons but a different number of electrons B. element with the same number of protons but a different number of neutrons C. element with the same number of neutrons but a different number of electrons D. element with the same number of neutrons but a different number of protons E. none of the above
Which of the following occurs in the proximal tubule?
A. Urine is collected. B. Blood pressure pushes fluid out of the capillaries. C. Glucose is transported from the blood into the filtrate. D. Certain amino acids are transported from the filtrate to the blood.
Carbon sequestration ________
A) involves capturing carbon emissions and then releasing them into the stratosphere B) converts carbon from carbon dioxide emissions into smaller elements that do not contribute to global climate change C) has proved to be more dangerous to the environment than releasing carbon emissions D) involves converting carbon dioxide gas to a liquid form for storage in the ocean or underground E) has been used by U.S. electrical plants since 1955, converting carbon dioxide to limestone
For a certain mammal, the allele associated with black fur B is dominant and the allele associated with white fur b is recessive. An individual that is homozygous for black fur BB mates with an individual that is homozygous for white fur bb. What is the probability (in percent) that one of their offspring will have white fur?
a. 0 b. 25% c. 50% d. 75%