Question

Auxins play a key role in tropism

• A. True
• B. False

Answer 1

The correct option is A True

• Auxins- play a key role in tropism (controlling the direction of plant growth).

Geotropism- Under the influence of gravity, auxins accumulate in the lower side of a horizontal stem, causing cells to enlarge faster, turning the stem upright.

• Phototropism- The auxin concentration on the shaded side stimulates cell elongation, turning the stem to the sun.

Therefore, the correct answer is option A.