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Question #45555
The Question
Biological and human-regulated systems often rely on strict 'selective mechanisms' or checkpoints. Read the following statements correlating reproductive checkpoints, legal interventions, and conservation strategies. Which of the following is INCORRECT?
Options
- A.
The filiform apparatus of synergids acts as a post-zygotic selective barrier by secreting chemotactic signals to guide compatible pollen tubes.
- B.
Self-incompatibility is a genetically mediated, pre-zygotic mechanism that prevents self-pollen from fertilizing ovules by inhibiting tube growth in the pistil.
- C.
Under the MTP (Amendment) Act 2021, terminating a pregnancy between 20 to 24 weeks acts as a legally regulated post-zygotic intervention requiring the opinion of two RMPs.
- D.
In-situ conservation prioritizes specific regions as 'hotspots' based on the selective criteria of high species richness, high endemism, and accelerated habitat loss.
Check Your Answer
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|Pollen-Pistil Interaction|MTP Legal Parameters
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Distinguishing between pre-zygotic and post-zygotic events.
Students often associate pollen tube guidance into the embryo sac with the immediate act of fertilization, mistakenly categorizing it as post-zygotic.
By integrating MTP (a true post-zygotic event) and Hotspots, the question forces context-switching across Botany, Zoology, and Ecology, testing the student's ability to maintain precise terminology under cognitive load.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Reproductive Health - Class 12 |
| Concept | MTP Legal Parameters |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |