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Regarding Coelom : Match the following and choose the most appropriate option:

A. coelom 1. Animals possessing coelom
B. coelomates 2. body cavity
C. pseudocoelom 3. not lined by mesoderm
D. acoelomates 4. lined by mesoderm
E. acoelom 5. mesoderm as scattered pouches between ectoderm & endoderm
F.pseudocoelomates 6. animals with no body cavity
7. aschelminthes
8. no body cavity

( A ) A-2,4; B-1; C-2,3,5; D-6; E-8; F-7
( B ) A-2,4; B-1; C-7; D-6; E-8; F-2,3,5
( C ) A-2; B-1; C-2,3,5; D-8; E-6; F-7
( D ) A-2,4; B-1; C-2,3,5; D-8; E-6; F-7
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1 Answer

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(A) is the right answer.

Coelom: The body cavity, which is lined by mesoderm is called coelom. Animals possessing coelom are called coelomates, e.g., annelids, molluscs, arthropods, echinoderms, hemichordates and chordates. In some animals, the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called pseudocoelom and the animals possessing them are called pseudocoelomates, e.g., aschelminthes. The animals in which the body cavity is absent are called acoelomates, e.g., platyhelminthes
answered Apr 2, 2014 by pady_1
 
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