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The internal buds of freshwater sponges which can survive unfavourable conditions are called
The internal buds of freshwater sponges which can survive unfavourable conditions are called
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Solution
The correct option is B gemmules
Gemmules are produced by most freshwater sponges and a few marine sponges during adverse environmental conditions. They are also called internal buds and contain a mass of archaeocytes (amoeboid cells found in sponges) surrounded by a protective covering. When favourable conditions return, a mass of archaeocytes come out from the micropyle and grow into a sponge.
Spongoecoel is the large central cavity present in the body of sponges. These canals are lined by flagellated cells called collar cells, also called choanocytes.
Osculum is the opening of the sponges through which water exits from the spongocoel, carrying with it the wastes of the animal.
Ostia are small pores or openings found on the surface of the sponges. These are the pores through which water enters the canal system.
Gemmules are produced by most freshwater sponges and a few marine sponges during adverse environmental conditions. They are also called internal buds and contain a mass of archaeocytes (amoeboid cells found in sponges) surrounded by a protective covering. When favourable conditions return, a mass of archaeocytes come out from the micropyle and grow into a sponge.
Spongoecoel is the large central cavity present in the body of sponges. These canals are lined by flagellated cells called collar cells, also called choanocytes.
Osculum is the opening of the sponges through which water exits from the spongocoel, carrying with it the wastes of the animal.
Ostia are small pores or openings found on the surface of the sponges. These are the pores through which water enters the canal system.
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