A) catching the prey
B) immobilising the prey
C) testing the food
D) testing the water
Correct Answer: B
Solution :
Stenotele or penetrant is the largest and most complex nematocyst. It pierces the body of prey and injects the poisonous fluid (hypnotoxin) that immobilizes the prey. Hydra then seizes its prey with tentacles and draws it into mouth.
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