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Question #47538
The Question
In tracing the evolutionary transition from bryophytes to pteridophytes, a student compares the capsule of a moss (e.g., Funaria) with the strobilus of a pteridophyte (e.g., Selaginella). Which of the following statements accurately evaluates the structural and evolutionary relationship between these two spore-bearing structures?
Options
- A.
Both are homologous structures representing modified shoot systems, but the moss capsule remains nutritionally dependent on the gametophyte.
- B.
The moss capsule is a terminal differentiation of an unbranched, dependent sporophyte, whereas the strobilus is a condensed axis bearing sporophylls on an independent sporophyte.
- C.
They are analogous structures because the moss capsule produces haploid spores via mitosis, whereas the sporangia within the strobilus produce haploid spores via meiosis.
- D.
The strobilus is a direct evolutionary derivative of the moss capsule, making them homologous structures that share a common origin from gametophytic tissue.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Bryophyte Sporophyte Anatomy|Productivity Ratios|Photosynthetic_Efficiency
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse structures with similar functions (spore production and dispersal) as being homologous.
The trap lies in failing to distinguish between the simple, unbranched, dependent sporophyte of bryophytes (which lacks true organs) and the complex, organ-differentiated (true root, stem, leaf), independent sporophyte of pteridophytes.
Assuming a strobilus is structurally homologous to a moss capsule ignores the evolutionary milestone of true shoot system development in vascular plants.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Bryophyte Sporophyte Anatomy |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |