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Question

Identify the animals that exhibht radial body symmetry.


A
1, 3, 4 and 6
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B
2, 5 and 6
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C
2 and 5
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D
5 and 6
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Solution

The correct option is C 2 and 5
Body symmetry is a major criteria for classification. There are 3 types of body symmetry based on which animals can be classified:
  • Asymetrical body - no imaginary cut on any axis of the body gives two equal halves. Ex: amoeba
  • Bilateral symmetry - body type containing only one axis through which an imaginary cut can result in two equal halves. Ex: human beings, salamander, pigeon, earthworms, etc.
  • Radial symmetry - body type in which an imaginary cut through any axis of the body results in two equal halves. Ex: starfish, sea anemone, jellyfish, etc.

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