Porifera have which canal system
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Answer:
Sponges belong to the phylum porifera. Ostia, spongocoel and osculum together form a canal system which is characteristic of all sponges. Canal system of Leucosolenia is of ascon type. It is the simplest type of canal system found in sponges. Water enters directly through ostia into the central spongocoel, which is lined by choanocytes, and leaves through osculum. Sycon type of canal system is found Sycon and Leucon type is found in Spongilla. There is no canal system named as radial type.142. (b) : Duck-billed platypus is an egg laying mammal. It is found in the rivers in eastern Australia and Tasmania. It is a beaver like monotreme about 50-60 cm long and well adapted to life in water. Usually 2 eggs are laid at a time. The female curls around them for incubation and remains inactive for about 2 weeks. Newly hatched young ones are exceedingly immature, naked, blind and each 2.5 cm long.
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