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Q. No.The collared flagellated cell shown in the given figure is called as a:
| 1. | Choanocyte and helps sponges in movement of water through their canal system |
| 2. | Choanocyte and helps sponges in reproducing asexually under favourable conditions |
| 3. | Cnidocyte and helps sponges in catching their prey by paralyzing them |
| 4. | Colloblast and helps sponges in sticking to a surface |
Subtopic: Phylum Porifera |
71%
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The animals in all the following phyla show bilateral symmetry, true coelom and segmented body except:
| 1. | Arthropoda | 2. | Mollusca |
| 3. | Chordata | 4. | Annelida |
Subtopic: Basis of Classification |
75%
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Fertilisation is external and development is indirect in:
1. I and V only
2. II, III and IV only
3. IV only
4. I, IV and V only
| I: | Sponges |
| II: | Echinoderms |
| III: | Hemichordates |
| IV: | Comb jellies |
| V: | Flatworms |
1. I and V only
2. II, III and IV only
3. IV only
4. I, IV and V only
Subtopic: Basis of Classification |
73%
From NCERT
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Unlike Arthropods, Annelids:
1. have a true coelom lined by embryonic mesoderm
2. have a closed circulatory system
3. do not reproduce by sexual methods
4. have a complete digestive system
1. have a true coelom lined by embryonic mesoderm
2. have a closed circulatory system
3. do not reproduce by sexual methods
4. have a complete digestive system
Subtopic: Phylum Annelida |
79%
From NCERT
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Match the common names with the biological names of these mollusks:
Codes:
| Column I | Column II | ||
| A | Octopus | P | Octopus vulgaris |
| B | Garden snail | Q | Aplysia californica |
| C | Sea hare | R | Helix aspersa |
| D | Pearl Oyster | S | Pinctada vulgaris |
| A | B | C | D | |
| 1. | S | R | Q | P |
| 2. | P | R | Q | S |
| 3. | P | Q | R | S |
| 4. | P | Q | S | R |
Subtopic: Phylum Mollusca |
79%
From NCERT
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The given figure is from your textbook and shows the classification of organisms with true coelom into various phyla. What would be peculiar for organisms shown by an * mark?
| 1. | They are the only organisms to possess an endoskeleton. |
| 2. | They exhibit radial or bilateral symmetry depending on the stage. |
| 3. | They are the only animals exclusively inhabiting marine water. |
| 4. | Bioluminescence is well marked in these animals. |
Subtopic: Basis of Classification |
89%
From NCERT
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A non-glandular skin will be seen in both:
| 1. | Snake and Frog | 2. | Chameleon and Turtle |
| 3. | Frog and Pigeon | 4. | Crocodile and Tiger |
Subtopic: Study of Reptilia |
65%
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Match Column I with Column II and choose the correct option:
1. A-ii, B-iii, C-v, D-iv, E-i
2. A-ii, B-v, C-iii, D-iv, E-i
3. A-i, B-iii, C-v, D-iv, E-ii
4. A-i, B-v, C-iii, D-iv, E-ii
| Column I | Column II | ||
| A | Porifera | (i) | Canal system |
| B | Aschelminthes | (ii) | Water-vascular system |
| C | Annelida | (iii) | Muscular pharynx |
| D | Arthropoda | (iv) | Jointed appendages |
| E | Echinodermata | (v) | Metameres |
1. A-ii, B-iii, C-v, D-iv, E-i
2. A-ii, B-v, C-iii, D-iv, E-i
3. A-i, B-iii, C-v, D-iv, E-ii
4. A-i, B-v, C-iii, D-iv, E-ii
Subtopic: Phylum Porifera | Phylum Aschelminthes | Phylum Annelida | Phylum Arthropoda | Phylum Echinodermata |
84%
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Ornithorhynchus is:
1. a flightless bird
2. a limbless amphibian
3. an egg laying mammal
4. an extinct reptile that was direct ancestor of mammals
1. a flightless bird
2. a limbless amphibian
3. an egg laying mammal
4. an extinct reptile that was direct ancestor of mammals
Subtopic: Study of Aves & Mammals |
77%
From NCERT
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Which of the following represents the correct combination without any exception?
| Characteristic | Class | |
| 1. | Mammary gland; hair on body; pinnae; two pairs of limbs | Mammalia |
| 2. | Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord | Chondrichthyes |
| 3. | Sucking and circular mouth; jaws absent; integument without scales; paired appendages | Cyclostomata |
| 4. | Body covered with feathers; skin moist and glandular; lungs with air sacs; fore limbs from wings | Aves |
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
51%
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