Question

Auxins include _______.
(A) IAA
(B) Cytokinin
(C) Gibberellin
(D) Ethylene
Choose the correct answer from the options given below:

• (A) and (D) only
• (A) and (B) only
• (B) and (C) only
• (A) only

Answer 1

The Correct Option is B

Auxins are essential plant hormones that orchestrate numerous growth and developmental processes throughout a plant's life. Consider the following:

• (A) IAA: Indole-3-acetic acid (IAA) serves as the primary auxin in plants.
• (B) Cytokinin: This plant hormone primarily facilitates cell division and is not classified as an auxin.
• (C) Gibberellin: Gibberellins, a separate class of plant hormones, govern growth and influence diverse developmental events, distinct from auxins.
• (D) Ethylene: Ethylene is a plant hormone associated with fruit ripening and is not a member of the auxin group.

Therefore, the only correct option is (A) only, as IAA is the sole compound listed that is identified as an auxin.