What are characteristics of Platyhelminthes, coelenterate, Echinodermata, mammals, amphibians.
A) Coelom is not common for the above classes in the animal kingdom because Platyhelminthes shows acoelomic nature, while others show true coelom. B) Symmetry is also not common because Platyhelminthes are bilaterally symmetrical same as mammals amphibians whereas Echinodermata is symmetrical in many planes and coelentrata is radially symmetrical c) Appendages are different in different organisms of these classes, some have tube feet, some have cilia and others have limbs etc.
