Where do cold ocean currents generally occur?
a. along the west coast of continents
b. near the poles
c. near the equator
d. along the east coast of continents
e. in the open ocean
ANSWER: a
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What was one of the primary results from the Hubbard Brook Watershed Project?
a. Deforestation causes flooding. b. New plant species that absorb less water were discovered. c. Pollution is gravely affecting that water supply. d. Primary consumers are the most important part of that energy pyramid. e. Trees absorb too much water and are not useful in a watershed area.
What is the most likely source of various
hangover symptoms?
a. acetate b. acetaldehyde c. ethanol d. alcohol dehydrogenase e. carbon dioxide
A plant breeder is attempting to breed a variety of corn with high oil content. Each generation, he crosses only those plants that have the highest oil content. Over time, the average oil content of his plants increases. He does this with two strains of plants. For Strain A, h2 = 0.3. For Strain B, h2 = 0.6. Which strain will more quickly increase in oil content with selection?
a. Strain A b. Strain B c. Strain C d. No difference
Found in the nucleus, a _______ is an association of DNA and proteins.
a) cell plate b) ribosome c) chromosome d) centromere