6
Given below are two statements
Statement (I) : Nematodes show hexaradial symmetry in lip region
Statement (II) : Nematodes show triradial symmetry in oesophagus
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Nematode Cuticle, Integument, Hypodermis, Sen
- Symmetry in Nematode Anatomy:
- Lip Region (Cephalic Apex): Statement (I) is correct because the ancestral nematode head has hexaradial symmetry, featuring 6 lips (2 subdorsal, 2 subventral, and 2 lateral) surrounding the oral aperture, each bearing cephalic sensilla.
- Esophagus (Pharynx): Statement (II) is correct because the nematode esophagus exhibits triradial symmetry, consisting of a cuticular lumen with three branches (one dorsal and two ventrolateral sectors) containing radially arranged muscle fibers.
- Conclusion: Both Statement (I) and Statement (II) are correct (Option 1).
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
Report
Want to practice this paper in exam conditions?
क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं?
Test yourself in 5-question batch format with timer and hidden answers.
5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode →
प्रैक्टिस टेस्ट मोड शुरू करें →