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Segmentation: 1. In some animals the body is externally, but not internally divided into segments with a serial repetition. 2. The phenomenon is known as metamerism. 3. Earthworm shows this pattern called metameric segmentation. Regarding 1,2 and 3:

( a ) 1 is correct but 2 and 3 are incorrect
( b ) 3 is incorrect but 1 and 2 are correct
( c ) 2 is incorrect but 1 and 3 are correct
( d ) 1 is incorrect but 2 and 3 are correct
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(D) is the right answer.

Segmentation: In some animals the body is externally and internally divided into segments with a serial repetition of at least some organs. For example, in earthworm, the body shows this pattern called metameric segmentation and the phenomenon is known as metamerism.
answered Mar 20, 2014 by pady_1
 

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