Question

Riddhi drew a classification chart as shown below.
Now, select the option that correctly identifies the characters $X,Y,P$ or $Q$.

• A. $X$ is eucoelomic body cavity
• B. $P$ is bilateral body symmetry
• C. $Q$ is radial body symmetry
• D. $Y$ is coelomic cavity lined by mesoderm

Answer 1

The correct option is D $Y$ is coelomic cavity lined by mesoderm

D. Y is coelomic cavity lined by mesoderm

EXPLANATION: Animalia kingdom is divided into two levels- cellular level and tissue level. Tissue level is divided into three parts on the basis of the presence or absence of coelom- acoelomate, pseudocoelomate, eucoelomate. In acoelomate coelom is absent, in pseudocoelomate true coelom is not present and in eucoelomate true coelom is present. Coelenterata and platyhelminthes are under the acoelomate group. The body of coelenterata is radial and the body of platyhelminthes is bilateral.