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सिअचिनलाई इकाइनोटर्मिटा फाइलमा किन राखिएको हो ? Why is sea-urchin kept in phylum Echimodermata? (i) तिनीहरूको बाह्य शरीर क्याल्करेसका काँढाले ढाकेको…

SEE Class 10 Science · 2082 · Solved Question with Answer

सिअचिनलाई इकाइनोटर्मिटा फाइलमा किन राखिएको हो ?
Why is sea-urchin kept in phylum Echimodermata?

(i) तिनीहरूको बाह्य शरीर क्याल्करेसका काँढाले ढाकेको हुन्छ ।
Because their bodies are externally covered by hart calcareous spines.

(ii) पानीमा पौड्न र त्यसको सतहमा हिड्नका लागि मांसपेसीयुक्त खुट्टा हुन्छन् ।
Because they have muscular feet to help in swimming in water and gliding on the surface

(iii) तिनीहरूको शरीर नरम हुन्छ
Because their body is soft

(iv) यसको टाउकोमा टेन्टाकल्स हुन्छन्
Because it has tentacles on the head

Solution

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