Class XI · Biology practice

Plant Growth and Development PYQs

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22 questions in this collection · Page 3 of 3

Question 21 of 22

🟢 Re NEET 2026 📘 CLASS XI

Plant Growth And Development

Which of the following plant growth regulators promotes internode elongation prior to flowering in cabbage?

Gibberellins promote stem and internode elongation and induce bolting in rosette plants such as cabbage.

Question 22 of 22

🟢 Re NEET 2026 📘 CLASS XI

Plant Growth And Development

Length of the stem at time 0 is 20 cm. The arithmetic growth rate is 30 cm per day. What is the length of the stem at the end of the 7th day?

Length = 20 + (30 × 7) = 230 cm.

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