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Question
Real organs are absent in___________.
Real organs are absent in___________.
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Solution
The correct option is B Coelenterata
The term Coelenterata is no longer recognized as scientifically valid, as the Cnidaria and Ctenophora have replaced it for ranking similar organisms. They are radially symmetrical, diploblastic multicellular animals with a tissue grade of organization and may be aquatic, freshwater or marine solitary or colonial forms, which may be free swimming or sedentary. Their body has a mouth at the oral end, which leads into a spacious cavity called gastrovascular cavity or coelenteron. Thus, organs and organ system are absent.
Hence the answer is option B.
The term Coelenterata is no longer recognized as scientifically valid, as the Cnidaria and Ctenophora have replaced it for ranking similar organisms. They are radially symmetrical, diploblastic multicellular animals with a tissue grade of organization and may be aquatic, freshwater or marine solitary or colonial forms, which may be free swimming or sedentary. Their body has a mouth at the oral end, which leads into a spacious cavity called gastrovascular cavity or coelenteron. Thus, organs and organ system are absent.
Hence the answer is option B.
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