Question

Read the given statements and choose the correct option: Statement I: Gemmae are green unicellular sexual buds which develop in receptacles called gemma cups. Statement II: Protonema develops directly from a spore

• A. Statement I is false but Statement II is true
• B. Both Statement I and Statement II are false
• C. Both Statement I and Statement II are true
• D. Statement I is true but Statement II is false

Hint:

Gemmae are asexual, multicellular structures, while protonema is a key stage in the moss life cycle from spores.

Answer 1

The Correct Option is A

• Statement I Analysis: Gemmae are reproductive structures found in some bryophytes (e.g., liverworts) and are involved in asexual reproduction. They are multicellular, green, and develop in specialized structures called gemma cups, not as unicellular sexual buds. The term "sexual buds" is incorrect as gemmae are asexual. Thus, Statement I is false.
• Statement II Analysis: In bryophytes (e.g., mosses), a protonema is the initial filamentous structure that develops directly from a spore upon germination. This is a well-established fact in plant life cycles, making Statement II true.
• Option Analysis:
  • (1) Statement I is false but Statement II is true: Aligns with the analysis. Correct.
  • (2) Both Statement I and Statement II are false: Contradicts the truth of Statement II. Incorrect.
  • (3) Both Statement I and Statement II are true: Contradicts the falsity of Statement I. Incorrect.
  • (4) Statement I is true but Statement II is false: Contradicts the truth of Statement II and falsity of Statement I. Incorrect.
• Conclusion: The correct option is (1), as Statement I is false (gemmae are multicellular and asexual) and Statement II is true (protonema develops directly from a spore).