Here are the terms matched to their correct definitions:
- Geotropism - c. changes in plant growth due to the force of gravity
- Positive phototropism - d. tendency for a plant to grow toward light
- Tropism - a. changes in plant growth that result from changes in environmental stimuli such as light, gravity, and/or touch
- Alternation of generations - b. life cycle, occurring in plants and some other organisms where they have a sexual and an asexual stage
So the final matches are:
- Geotropism - c
- Positive phototropism - d
- Tropism - a
- Alternation of generations - b