Glutamate plays an essential role in the synthesis of how many nonessential amino acids?
A) 3
B) 5
C) 10
D) 20
B
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Which of the following describes the basic way in which electricity is generated using the ocean thermal energy conversion technique, or OTEC?
A. temperature difference between the surface and deep ocean waters B. heat energy obtained from surface winds blowing across warm ocean waters C. convection cells within the ocean D. temperature difference between the incoming and outgoing tides E. the ocean's geothermal energy
Use the accompanying figure of the Mohs scale of hardness to answer this question. If you have a mineral sample that is capable of scratching a penny but is scratched by a wire nail, its hardness must be ________
A) less than 3.5 B) between 3.5 and 4.5 C) greater than 4.5 D) less than 2.5
Which of the following is TRUE?
A) The Sun produces energy through fusion processes. B) The Sun is also a planet. C) The Milky Way is part of our Solar System. D) The Sun is the largest star in the Milky Way Galaxy.
Marine invasive species like this tropical seaweed
1.may expand their range if global warming continues.
2.will be eaten by native species very soon after the invasion.
3.must reproduce even more successfully in their new habitat.
4.once introduced cannot be stopped.