Features | Phylum A | Phylum B | |
a. | Presence of 3 germ layers | Absent | Present |
b. | Hermaphroditism | Present | Present |
c. | Regeneration | Present | Present in some members |
d. | Digestive System | Absent | Incomplete |
A | B | |
1. | Platyhelminthes | Arthropoda |
2. | Porifera | Platyhelminthes |
3. | Cnidaria | Aschelminthes |
4. | Ctenophora | Annelida |
Column-I | Column-II | ||
a. | Annelids | (i) | Triploblastic acoelomate |
b. | Platyhelminths | (ii) | Ciliated comb plates |
c. | Aschelminths | (iii) | Metamerism |
d. | Ctenophores | (iv) | Pseudocoelomates |
Euspongia, Hirudinaria, Meandrina, Chaetopleura, Carcharadon, Ctenplona, Fasciola, Bombyx, Ancylostoma |
1. | Gill slits are ventrally placed |
2. | Head and trunk are widened considerably |
3. | Distinct demarcation between body and tail |
4. | Their pectorals fins are distinctly marked off from cylindrical bodies |