Terminology and Summary of Criteria for Classification

Q. Bilateral symmetry, metameric segmentation, coelom and open circulatory system characterize which of the following organisms?

1. Leech
2. Mussel
3. Crab
4. Sponges

Q.

Choose the correct option.

1. Aves and Chordata — Classes

2. Annelida and Porifera — Phyla

3. Mollusca and Hydrozoa — Classes

4. Oligochaeta and Arthropoda — Phyla

Q. Blastopore develops into the anus in

1. protostomes
2. deuterostomes
3. pseudocoelomates
4. acoelomates

Q. Blastopore develops into the anus in

1. protostomes
2. deuterostomes
3. pseudocoelomates
4. acoelomates