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 |