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Question
The cross-section of the body of an invertebrate is given below. Identify the animal, which has this body plan.
The cross-section of the body of an invertebrate is given below. Identify the animal, which has this body plan.
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Solution
The correct option is C Planaria
The shape of Platyhelminthes comes from the fact that they, unlike earthworms, have no coelom (otherwise known as a fluid-filled body cavity). Therefore, Platyhelminthes are acoelomates ('a' meaning 'without'). The presence or absence of a fluid-filled body cavity is important as it actually influences everything from the way these creatures interact with their environment.
The shape of Platyhelminthes comes from the fact that they, unlike earthworms, have no coelom (otherwise known as a fluid-filled body cavity). Therefore, Platyhelminthes are acoelomates ('a' meaning 'without'). The presence or absence of a fluid-filled body cavity is important as it actually influences everything from the way these creatures interact with their environment.
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