Question

Read the following statements regarding gibberellins:
A. Gibberellins promote stem elongation.
B. They can induce parthenocarpy.
C. They inhibit seed germination.
Choose the correct answer from the options given below:

• A. Only A and B are correct
• B. Only B and C are correct
• C. Only A and C are correct
• D. A, B and C are correct Correct Answer: (A) Only A and B are correct

Hint:

Think of Gibberellin and Abscisic Acid (ABA) as two bitter rivals fighting a constant tug-of-war inside a seed: - Gibberellin acts as the "Wake-Up" signal that breaks dormancy and starts germination. - ABA acts as the "Sleep" signal that keeps the seed dormant during harsh conditions. Knowing this functional opposition helps you spot incorrect statements about dormancy instantly!

Answer 1

The Correct Option is A

Step 1: Check statement A.
Gibberellins make stems grow longer, as seen in sugarcane and grapes. So A is true.

Step 2: Check statement B.
They can cause parthenocarpy, which means fruit forms without seeds. This is used in tomatoes and apples. So B is true.

Step 3: Check statement C.
It says they stop seed germination. This is wrong. Gibberellins actually help seeds sprout by waking up enzymes that break down stored food. The hormone that blocks germination is ABA, not gibberellin. So C is false.

Step 4: Pick the option.
A and B are true and C is false, so the answer is option 1.
\[ \boxed{\text{Only A and B are correct}} \]