Question

Biology benchmark 2 semester exam fall 24
What photosynthesis is causing the bean seeding to bend
Gravitropism
Photoptrapoism
Thigmotropism
Rapid response

Answer 1

The bending of a bean seedling towards light during photosynthesis is primarily caused by **phototropism**. Phototropism is the growth response of a plant toward a light source, which occurs due to differential growth rates on the sides of the plant that are exposed to light versus those that are not.

To clarify the other terms:
- **Gravitropism** refers to a plant's growth response to gravity, with roots growing down (positive gravitropism) and shoots growing up (negative gravitropism).
- **Thigmotropism** is the response of a plant to touch or physical contact, often seen in climbing plants.
- **Rapid response** typically refers to immediate reactions to stimuli, like the closing of a Venus flytrap, rather than growth responses.

In your case, since you're asking about bending related to light during photosynthesis, **phototropism** is the correct answer.