Movement in Animals and Plants — BIOLOGY STD 7 — Question
ICSE BoardEnglish MediumSTD 7BIOLOGYMovement in Animals and Plants4 Marks
Question
How does Hydra move ? Explain with the help suitable diagrams.
✓
Answer
Hydra is a multicellular organisms which moves with the help of tentacles. Looping and somersaulting movement help it to move. In looping movement, the foot of Hydra remains attached to the surface and body bends over till the tentacles touch or get attached to the surface. Now the foot releases its hold and get placed close to the tentacles. The tentacles get released and the Hydra straightens itself. During somersaulting movement the foot of the Hydra remains attached to the surface and body bends till the tentacles touches foe surface. The foot releases its hold and the body of Hydra straightens out. Now the Hydra stands on its tentacles. The process is repeatea, and the Hydra moves forward.
a. Looping movement b. Locomotion in Hydra
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