Question

1. organisms that live in deep - sea ocean vents use chemicals rather than sunlight to drive the energy - producing reactions. these organisms undergo what process? a) chemosynthesis b) photosynthesis c) biosynthesis d) accumulation 42) humans alter the sulfur cycle by a) burning fossil fuels. b) mining rock. c) applying too much fertilizer to crop fields. d) clear - cutting tropical forests.

Explanation:

1. Organisms in deep - sea ocean vents use chemicals to drive energy - producing reactions, which is chemosynthesis. Photosynthesis uses sunlight, and biosynthesis is a general term for building molecules in living things. Accumulation is not the process here.
2. Burning fossil fuels releases sulfur compounds into the atmosphere, which can alter the sulfur cycle. Mining rock, applying fertilizers, and clear - cutting tropical forests are not directly related to altering the sulfur cycle in the same way as burning fossil fuels.

Answer:

1. A. Chemosynthesis
2. A. Burning fossil fuels