Question

1. Identify figure A to D.
2. Which one of them is (i) diplobalstic; (ii) triploblastic?
3. Which triplobalstic animal is (i) Acoelomate; (ii) Coelomate?
4. Which one belong to phylum
   (i) Cnidaria; (ii) Platyhelminthes; (iii) Annelids; (iv) Arthropoda?
5. Which one of them has
   (i) Organ level organisation; (ii) Organ-system level organisation?
6. Which one of them has excretory organs in the form of (i) Flame cells; (ii) Nephridia?
7. Which one of them has trachae as the respiratory organ?

Answer 1

1. A - Scolopendra (centipede); B - Hydra; C - Fasciola hepatica (liver fluke); D - Pheretima posthuma (earthworm).
2. (i) Diploblastic - Hydra. (ii) Triploblastic - Scolopendra, Fasciola and Pheretima.
3. (i) Acoelomate - Fasciola. (ii) Coelomates - Pheretima and Scolopendra.
4. (i) Cnidaria - Hydra. (ii) Platyhelminthes - Fasciola. (iii) Annelida - Pheretima. (iv) Arthropoda - Scolopendra.
5. (i) Organ-level organisation - Fasciola. (ii) Organ-system-level organisation - Pheretima and Scolopendra.
6. (i) Flame cells - Fasciola. (ii) Nephridia - Pheretima.
7. Scolopendra breathes through tracheae.