A botanist places an agar block containing auxin on the cut top surface of a sunflower seedling,positioning it off-center.If the auxin,as expected,diffuses into the stem as if it had come from the tip of the coleoptile,what is the botanist likely to find after a day has passed?
A) The sunflower has grown straight up.
B) The sunflower has grown and bent away from the side with the block.
C) The sunflower has grown and bent toward the side with the block.
D) The sunflower has failed to grow.
E) The sunflower has died.

Question

Quizplus · Accepted Answer

Auxin promotes cell elongation on the side where it is more concentrated, causing the plant to bend away from the side with the block.

A Botanist Places an Agar Block Containing Auxin on the Cut