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Q: Which cells are found only in sponges? कौन सी कोशिकाएँ केवल स्पंजों में ही पायी जाती है?
  • A. Amoeboid cells / अमीबॉइड कोशिकाएँ
  • B. Choanocytes / कोनोसाइट्स
  • C. Trichocysts / ट्राइकोसाइट्स
  • D. Gland cells/ ग्रँथि कोशिकाएँ
Correct Answer: Option B - Flagellated Choanocytes or Collar Cells, found associated with Canal System, occurs only in Sponges.
B. Flagellated Choanocytes or Collar Cells, found associated with Canal System, occurs only in Sponges.

Explanations:

Flagellated Choanocytes or Collar Cells, found associated with Canal System, occurs only in Sponges.