a scientist plants seedlings in different locations to demonstrate how plants respond to their environment. Which of these observations provides evidence of gravitropism?

Question

Seedlings planted away from a source of sunlight grow toward the light.
Seedlings planted in containers that are tipped over sideways extend their roots downward.
Seedlings planted near a stick wrap around the stick.
Seedlings planted in containers that are tipped over sideways grow sideways.

Answer 1

Seedlings planted in containers that are tipped over sideways extend their roots downward. This observation provides evidence of gravitropism, which is the growth movement in response to gravity. In this case, the roots are growing downward in response to the repositioning of the container.