Consider the following traits:
I. Tripartite body division
II. Diverticulum of foregut, stomochord
III. Deuterostome embryonic development
An animal that can show all these traits can be:
1. | Ascidia | 2. | Branchiostoma |
3. | Asterias | 4. | Balanoglossus |
Which of the following will be defining property of mammals?
1. They give birth to young ones
2. They nourish their young with milk
3. They have a uterus
4. They have a thick coat of hair
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What is common to the list of animals given in the box?
Sycon, Fasciola, Ancylostoma, Pheretima, Periplaneta, Carcharodon, Macropus |
1. | Monoecy | 2. | Internal fertilization |
3. | Oviparity | 4. | Triploblastic organization |
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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.
The animals belonging to all the following groups are exclusively marine except:
1. | Ctenophora | 2. | Porifera |
3. | Protochordata | 4. | Echinodermata |
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Identify the incorrectly matched pair:
Phylum |
Characteristic |
|
1. |
Porifera |
Water vascular system |
2. |
Ctenophora |
Bioluminescence |
3. |
Molluska |
Radula |
4. |
Annelida |
Closed circulatory system |
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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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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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Approximately what percentage of existing animal species are invertebrates?
1. | 20% | 2. | 50% |
3. | 70% | 4. | 95% |