Question

Choose the correct statements among the following:
[I.] Suckers are underground stems growing horizontally beneath the soil and become aerial.
[II.] The function of petiole is to attach leaf to stem.
[III.] Alstonia shows opposite phyllotaxy.
[IV.] In Pisum, terminal leaflets form as tendril.

• A. I and IV
• B. II and III
• C. I and III
• D. II and IV

Hint:

Focus on definitions and examples: knowing which plants show specific modifications (like tendrils, phyllotaxy) is key in NCERT-based biology questions.

Answer 1

The Correct Option is A

Statement I:
Correct. Suckers are indeed underground stems that grow horizontally beneath the soil and then give rise to aerial shoots. Example: Mint. Statement II:
Incorrect. Though the petiole helps in leaf attachment, its main function is to expose the lamina to light efficiently for photosynthesis, not merely attachment. Statement III:
Incorrect. Alstonia exhibits whorled phyllotaxy, not opposite. Statement IV:
Correct. In Pisum sativum (pea plant), the terminal leaflets are modified into tendrils to help in climbing.