Deoxyribonucleic acid (DNA) contains billions of atoms and is very large. It would be considered a(n):
A. Isotope
B. Element
C. Mega-atom
D. Compound
E. Enzyme
Answer: D
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The primary purpose served by surface ocean currents is to:
A) help dissipate excess energy received at the poles during their periods of 24-hour daylight. B) equalize climate impacts felt on opposite sides of the same continent. C) transfer heat and equalize the imbalance of energy between the poles and the equator. D) drive atmospheric wind patterns.
A recently cut tree exhibits a very narrow set of tree rings for a period of ten years. What can you hypothesize about local climate during the ten years in which the tree produced the narrow rings?
A. It varied between warm, wet years and cool, dry years. B. It was cool and/or dry. C. It was warm and wet. D. There is not enough data to answer.
During an El Niño, upwelling of cool waters along the west coast of South America is intensified
Indicate whether the statement is true or false
Matching
1. On the dilution and decay of degradable wastes figure, choose the zone in which populations of organisms with high oxygen requirements will most likely be eliminated. 2. On the dilution and decay of degradable wastes figure, choose the zone in which the breakdown of degradable wastes by bacteria starts to deplete the dissolved oxygen. 3. On the dilution and decay of degradable wastes figure, choose the zone in which the water has recovered from oxygen-demanding wastes and heat. 4. On the dilution and decay of degradable wastes figure, choose the zone in which the water needs time and must have an adequate flow rate. 5. On the dilution and decay of degradable wastes figure, choose the zone in which the bacteria have not started the decay of degradable, oxygen-demanding wastes.