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Q. No.Parazoa is a taxon at the base of the phylogenetic tree of the animal kingdom and includes the most primitive forms, characterized by not having proper tissues. The phylum/phyla included in this taxon will be:
| I. Porifera | II. Cnidaria | III. Ctenophora |
| 1. | Only I | 2. | Only II and III |
| 3. | Only I and II | 4. | I, II and III |
In metamerism, there is serial repetition of unit subdivisions of:
| I. | Ectoderm products |
| II. | Mesoderm products |
| III. | Endoderm products |
| 1. | Only II | 2. | Only I and II |
| 3. | Only II and III | 4. | I, II and III |
Which of the following is not a character of deuterostomes?
| 1. | Radial cleavage |
| 2. | Schizocoelous coelom |
| 3. | Indeterminate cleavage |
| 4. | Blastopore forms anus |
Radially symmetrical animals:
1. Are all triploblastic
2. Tend to be sessile and passively floating
3. Have a definite head and a brain
4. Have an anterior and a posterior end
Approximately what percentage of existing animal species are invertebrates?
| 1. | 20% | 2. | 50% |
| 3. | 70% | 4. | 95% |
Identify the correct statement:
1. All pseudocoelomates are protostomes
2. All bilaterally symmetrical animals have a coelom
3. All animals have at least a tissue grade organization
4. All radially symmetrical animals are diploblastic
Match the following list of animals with their level of organization.
| Division of Labour | Animal | ||
| A. | Organ level | i. | Pheritima |
| B. | Cellular aggregate level | ii. | Fasciola |
| C. | Tissue level | iii. | Spongilla |
| D. | Organ system level | iv. | Obelia |
Choose the correct match showing division of labour with animal example:
| i | ii | iii | iv | |
| 1. | B | C | D | A |
| 2. | B | D | C | A |
| 3. | D | A | B | C |
| 4. | A | D | C | B |
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