A) It can be re-used
B) Its ejection is conditioned reflex
C) It is ejected on contact and pierce the prey
D) Due to which other Hydra doesnt come in contact with it.
Correct Answer: C
Solution :
Nematocysts are the stinging cells and are the organs of offence and defence of coelenterates. Nematocyst contains a poisonous proteinaceous fluid hypnofoxin along tube which injects the fluid into the victim. They explode after coming in contact with the prey.
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