if hydra is sessile organism than how it shows locomotion.
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Hydra has several methods of locomotion.
Usually it bends down and attaches to the substratum with the help of the glutinant nematocyst. It now releases and remove remove the basal disc to a new position and again stands up by disengaging its tentacles this type of locomotion is known as walking.
Sometimes it walks inverted by using the tentacles as legs again it may glid considerably by dragging the basal disc the cell of which have special power of throwing out pseudopodia like an amoeba.
Usually it bends down and attaches to the substratum with the help of the glutinant nematocyst. It now releases and remove remove the basal disc to a new position and again stands up by disengaging its tentacles this type of locomotion is known as walking.
Sometimes it walks inverted by using the tentacles as legs again it may glid considerably by dragging the basal disc the cell of which have special power of throwing out pseudopodia like an amoeba.
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