Scenario: You observe the growth of a group of plants that have been tipped over.

Question

How will auxin influence cell growth in the roots of these plants?
(1 point)
• Auxin will build up on the lower side of the root and inhibit cell growth.
• Auxin will build up on the upper side of the root and stimulate cell growth.
• Auxin will build up on the upper side of the root and inhibit cell growth.
• Auxin will build up on the lower side of the root and stimulate cell growth.

Answer 1

In the scenario where plants have been tipped over, auxin distribution is affected by gravity. In the roots, auxin will accumulate on the lower side. This accumulation leads to inhibition of cell elongation on that side, while the cells on the upper side continue to grow. As a result, the root bends downwards.

Therefore, the correct statement regarding the influence of auxin on cell growth in the roots of these plants is:

• Auxin will build up on the lower side of the root and inhibit cell growth.