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Question #47552
The Question
The evolutionary transition from Gymnosperms to Angiosperms involved overcoming specific constraints related to vascular efficiency and reproductive geometry. Which of the following statements is INCORRECT?
Options
- A.
The absence of an ovary wall in gymnosperms leaves the ovules exposed before and after fertilization, increasing their vulnerability to environmental desiccation.
- B.
Because gymnosperm ovules are naked, they rely primarily on anemophily, with pollen grains landing directly on the micropyle rather than on a receptive stigma.
- C.
To rapidly nourish the developing embryo in their exposed seeds, gymnosperms utilize a highly efficient phloem system consisting of sieve tubes and companion cells.
- D.
In angiosperms, the evolution of the ovary provided a dual advantage: protecting the seed's vascular supply from environmental stress and facilitating diverse biotic pollination strategies.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Companion Cell-Sieve Tube Symport|Active Transport|ATP
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often associate 'advanced seed-bearing plants' or 'efficient nutrient translocation' with the presence of sieve tubes and companion cells.
This question exploits a functional overlap trap by mixing the true reproductive vulnerability of gymnosperms (naked ovules) with a false anatomical premise.
Students must strictly recall the NCERT distinction: Gymnosperms possess sieve cells and albuminous cells, completely lacking the sieve tubes and companion cells characteristic of Angiosperms.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Vascular Evolution Sequence |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |