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Regarding symmetry in animals : Match the following and choose the most appropriate option:

A. asymmetrical 1. any plane passing through the central axis of the body divides the organism into two identical halves
B. radial symmetry 2. any plane that passes through the central axis does not divide into equal halves
C. bilateral symmetry 3. the body can be divided into identical left and right halves in only one plane
4. the body can be divided into identical top and bottom halves in only one plane

( A ) A-2; B-1; C-3
( B ) A-3; B-1; C-4
( C ) A-2; B-1; C-4
( D ) A-1; B-2; C-4
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1 Answer

(A) is the right answer.

Animals can be categorised on the basis of their symmetry. asymmetrical - any plane that passes through the centre does not divide them into equal halves; when any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry; bilateral symmetry - the body can be divided into identical left and right halves in only one plane.
answered Apr 2, 2014 by pady_1
 
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