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Question #45504
The Question
In certain angiosperms exhibiting polyembryony, embryos can occasionally arise directly from the synergids of an unreduced embryo sac. In the context of this specific developmental shift, which of the following statements is INCORRECT?
Options
- A.
The filiform apparatus retains its primary chemo-attractive role to facilitate double fertilization for these specific synergids.
- B.
The embryos derived from these synergid cells will be genetically identical to the maternal sporophyte.
- C.
This phenomenon exemplifies apomixis, where gametophytic cells bypass syngamy to undergo clonal mitotic proliferation.
- D.
The structural presence of the filiform apparatus may persist, but its evolutionary function is rendered obsolete in the formation of these specific embryos.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Synergid Filiform Apparatus|Polyembryony Mechanisms|Adventive Embryony
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Functional Fixedness.
Students rigidly associate the filiform apparatus exclusively with pollen tube guidance (rote NCERT fact) and fail to apply the 'If/Then' logic: IF fertilization is bypassed (apomixis), THEN the chemo-attractive function of the filiform apparatus is rendered obsolete for that specific cell's new developmental fate.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Sexual Reproduction in Flowering Plants - Class 12 |
| Concept | Synergid Filiform Apparatus |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |