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Question
Choose the organism which is acoelomate, bilaterally symmetrical, triploblastic:
Choose the organism which is acoelomate, bilaterally symmetrical, triploblastic:
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Solution
The correct option is D Fasciola
Fasciola is flat-worm and is a part of phylum Platyhelminthes. The features of this phylum includes bilateral symmtery, triploblastic, organ level of organisation. Their bodies can be divided equally from a single plane passing through the centre. They have three germ layers: ectoderm, mesoderm and endoderm. They are acoelomates as they lack body cavity. They have organs such as eye, intestine, etc. and hence have organ level of organisation.
Ascaris, Ancylostoma and Dracunculus are round-worms and are a part of phylum Aschelminthes. They are bilaterally symmetrical, triploblastic and have organ system level of organisation. They are pseudocoelomates as their body cavity is not lined by mesoderm layer.
Fasciola is flat-worm and is a part of phylum Platyhelminthes. The features of this phylum includes bilateral symmtery, triploblastic, organ level of organisation. Their bodies can be divided equally from a single plane passing through the centre. They have three germ layers: ectoderm, mesoderm and endoderm. They are acoelomates as they lack body cavity. They have organs such as eye, intestine, etc. and hence have organ level of organisation.
Ascaris, Ancylostoma and Dracunculus are round-worms and are a part of phylum Aschelminthes. They are bilaterally symmetrical, triploblastic and have organ system level of organisation. They are pseudocoelomates as their body cavity is not lined by mesoderm layer.
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