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Canal system in Porifera is not associated with
Canal system in Porifera is not associated with
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Solution
The correct option is D None of the above
The body of all sponges is perforated by having a large number of apertures through which water enters the body and flows through a system of crisscrossing canals. This collectively forms the canal system which is a characteristic feature of poriferans. The flagella of choanocytes beat to produce a water current, which enters the spongocoel through Ostia. It carries food particles and oxygen and sweeps away the metabolic wastes through osculum. Therefore, the canal system serves the function of food collection, respiration and excretion. Some sponges have oviparous fertilization, where sperm and eggs meet in open water. Archaeocytes (or amoebocytes) are totipotent cells in sponges, which can transform into sclerocytes, spongocytes, or collencytes. They have a role in nutrient transport and sexual reproduction. Hence, the option D is the correct answer.
The body of all sponges is perforated by having a large number of apertures through which water enters the body and flows through a system of crisscrossing canals. This collectively forms the canal system which is a characteristic feature of poriferans. The flagella of choanocytes beat to produce a water current, which enters the spongocoel through Ostia. It carries food particles and oxygen and sweeps away the metabolic wastes through osculum. Therefore, the canal system serves the function of food collection, respiration and excretion. Some sponges have oviparous fertilization, where sperm and eggs meet in open water. Archaeocytes (or amoebocytes) are totipotent cells in sponges, which can transform into sclerocytes, spongocytes, or collencytes. They have a role in nutrient transport and sexual reproduction. Hence, the option D is the correct answer.
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