A) predation
B) metamerism
C) hibernation
D) mimicry
Correct Answer: A
Solution :
Hydra is exclusively carnivorous and obtained its food as a predator. Its prey are mostly aquatic small animals like insects, crustaceans larvae, worms and egg of small fishes. The body of annelids divided into similar segments called metameres or somites. This segmentation is called metamerism. Segments are separated from each other by distinct ring-like grooves. In cold blooded (poikilothermic) animals the body temperature fluctuate with the environmental change. In winter these animals become metabolicaly inactive and this state of dormancy or suspended animation is called hibernation. Mimicry is the superficial but close resemblance of one organism to another or to natural objects among which it lives that secure its concealment protection or some other advantage.
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