Q. No.Which one of the following statements is incorrect?
1. Mesoglea is present in between ectoderm and endoderm in Obelia
2. Radial symmetry is found in Asterias
3. Fasciola is a pseudocoelomate animal
4. Taenia is a triploblastic animal
1. Mesoglea is present in between ectoderm and endoderm in Obelia
2. Radial symmetry is found in Asterias
3. Fasciola is a pseudocoelomate animal
4. Taenia is a triploblastic animal
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Which one of the following statements is incorrect?
| 1. | In cockroaches and prawns, excretion of waste material occurs through malpighian tubules. |
| 2. | In ctenophores, locomotion is mediated by comb plates. |
| 3. | In Fasciola flame cells take part in excretion. |
| 4. | Earthworms are hermaphrodites and yet cross fertilization take place among them. |
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To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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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Body cavity is the cavity present between body wall and gut wall. In some animals, the body cavity is not lined by mesoderm. Such animals are called
| 1. | Acoelomate | 2. | Pseudocoelomate |
| 3. | Coelomate | 4. | Haemocoelomate |
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‘Cephalization’ in animals was facilitated by evolution of:
| 1. | Radial symmetry |
| 2. | Tissue grade organization |
| 3. | Bilateral symmetry |
| 4. | True coelom |
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 |
Animals with bilateral symmetry have all the following except:
| 1. | Anterior and posterior end |
| 2. | Right and left half |
| 3. | Dorsal and ventral surface |
| 4. | Oral and aboral surface |
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