What is an example of an energy source that is renewable and has less environmental impact than fossil fuels?
A. bioenergy
B. natural gas
C. crude oil
D. coal
Answer: A. bioenergy
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Which sediments arrive in the ocean from continents via wind and water?
A) terrigenous sediments B) biogenous sediments C) hydrogenous (or authigenic) sediments D) cosmogenous sediments
Which of the following is a starting material in the synthesis of nitroglycerin?
A) ethylene glycol B) 1,2-propanediol C) 1,3-propanediol D) 1,2,3-propanetriol
Based on all possible combinations V, J, D and constant regions, approximately how many antibody combinations are theoretically possible?
A) approximately 10,000 B) approximately 1,000,000 C) more than 2 million D) more than 1 billion
Why does the lithosphere thicken as it moves away from a mid-ocean ridge?
What will be an ideal response?