Biology · Aschelminthes
Which of the following statements is true regarding the alimentary canal in the phylum Aschelminthes?
- 1Digestion occurs strictly intracellularly with no distinct gut.
- 2It is complete, possessing a well-developed muscular pharynx, a mouth, and an anus.✓
- 3It is incomplete, having only a single opening for both ingestion and egestion.
- 4The alimentary canal is absent.
Correct answer
It is complete, possessing a well-developed muscular pharynx, a mouth, and an anus.
Explanation
सही विकल्प:
- (C) यह पूर्ण होती है, जिसमें एक सुविकसित पेशीय ग्रसनी, मुख तथा गुदा होते हैं।
स्पष्टीकरण: संघ एस्केल्मिन्थीज (Aschelminthes) के जीवों, जिन्हें आमतौर पर गोलकृमि (Roundworms) कहा जाता है, में पाचन तंत्र पूर्ण होता है। इनमें मुख से लेकर गुदा तक एक सुव्यवस्थित आहारनाल पाई जाती है और भोजन को अंदर खींचने के लिए एक सुविकसित पेशीय ग्रसनी (muscular pharynx) होती है।
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