Vines in tropical rain forests must grow toward large trees before being able to grow toward the sun. To reach a large tree, the most useful kind of growth movement for a tropical vine presumably would be ________.
A) negative thigmotropism
B) negative phototropism
C) negative gravitropism
D) the opposite of circadian rhythms

Question

Quizplus · Accepted Answer

Negative phototropism is the growth movement away from light, which would help the vine grow toward the shade of a large tree before climbing it to reach sunlight.

Vines in Tropical Rain Forests Must Grow Toward Large Trees