Q. No.Approximately what percentage of existing animal species are invertebrates?
1.
20%
2.
50%
3.
70%
4.
95%
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. |
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 |
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
Identify the incorrectly matched pair:
|
Phylum |
Characteristic |
|
|
1. |
Porifera |
Water vascular system |
|
2. |
Ctenophora |
Bioluminescence |
|
3. |
Molluska |
Radula |
|
4. |
Annelida |
Closed circulatory system |
The animals belonging to all the following groups are exclusively marine except:
| 1. | Ctenophora | 2. | Porifera |
| 3. | Protochordata | 4. | Echinodermata |
Which of the following statements regarding Chondrichthyes may not be true for majority of members of the class?
| 1. | Notochord is persistent throughout life. |
| 2. | Skin has placoid scales. |
| 3. | Fertilization is internal. |
| 4. | Mouth is located ventrally. |
Perhaps the biggest reason for the enormous success of Arthropods is?
| 1. | Chitinous exoskeleton | 2. | Diverse appendages |
| 3. | Respiration by tracheoles | 4. | Internal fertilization |
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
Which of the following statements is not true about Nematodes?
1. They are bilaterally symmetrical, un-segmented worms
2. They are covered with a flexible, thick cuticle that is molted four times as they grow
3. They possess cilia or flagella on their reproductive cells
4. They possess a hydrostatic skeleton
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