An animal with the following body wall organization will not have:

1. Cepahilzation

2. Three germ layers

3. Bilateral symmetry

4. A complete digestive tract

(1) Myotomes

(2) Metameres

(3) Proglottides

(4) Comb plates

(1) Porifera                         

(2) Cnidaria

(3) Ctenophora                   

(4) Platyhelminthes

(1) Ventral nerve cord                   

(2) Post anal tail

(3) Gill slits                                  

(4) A notochord

(1) Ectoderm                   

(2) Mesoderm

(3) Endoderm                  

(4) Ectoderm and Mesoderm

(1) Mesenteron                              

(2) Mesenchyme

(3) Mesorchium                             

(4) Mesoglea

(1) Body is made of distinct tissues but true organs have not evolved

(2) They are carnivores

(3) They may have two body forms – polyps and medusa

(4) The digestion is completely intra-cellular

(1) Presence of true coelom but absence of metamerism

(2) Presence of true coelom and of metamerism

(3) Absence of true coelom but presence of metamerism

(4) Presence of neither true coelom nor metamerism

(1) Tunicates                         

(2) Lancelets

(3) Cyclostomata          

(4) Bony fishes

(1) Diploblastic organisms with tissue level of organization

(2) Absence of Cnidocytes

(3) Presence of internal ciliated comb plates

(4) Bio-luminescence well marked in some members