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AIIMS 2013
Exam
AIIMS
Year
2013
Subject
Botany
Chapter
Animal Kingdom

AIIMS 2013 · Botany · Animal Kingdom

Stinging capsules (nematocysts) are found in

Stinging capsules (nematocysts) are found in

Options

  1. Awasp and honeybee
  2. Bscorpion and cobra
  3. Csea pen and sea fan
  4. Dcactus and Venus flytrap.

Correct answer

C. sea pen and sea fan

Step-by-step solution

Stinging cells (cnidocytes or cnidoblasts or nematoblasts) are used for offence and defence. These have nematocysts (the stinging organs), composed of capsule, shaft and thread tube. The thread tube coils around the prey or attaches to it or injects a toxin, called hypnotoxin which paralyzes the victim. They are found in cnidarians- sea pen (Pennatula), sea fan (Gorgonia), etc.
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