Bacteria in hydrothermal vent communities deep in the ocean use which process to gain energy?
a. chemosynthesis c. photosynthesis
b. primary production d. nitrification
A
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A single flower or small bouquet worn by a man is called a(n) _____
A) corsage B) nosegay C) arrangement D) boutonniere
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The abbreviation for the plastic pipe used in systems for water and gas supply lines and irrigation systems is ____________________.
Fill in the blank(s) with the appropriate word(s).
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A substance that causes a chemical reaction is a(n) _____
a. enzyme c. surfactant b. receptor d. fermenter
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When servicing a cylinder head, which of these operations should be performed first?
A) Installing replacement guides B) Resurfacing the head C) Grinding the seats D) Grinding the valves
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