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Q. No.You discover an organism and observe that it shows the presence of the following characteristics:
A:
Bilateral symmetry
B:
Body covered with a plate like exoskeleton
C:
Legs with joints and wings
You conclude that this must be an arthropod but want to get more confident by observing another feature. Which of the following, if present, will strengthen your argument?
1.
Closed circulation
2.
Lack of a true coelom
3.
Ammonotelic excretion
4.
Body divided into head, thorax and abdomen segments
Subtopic: Phylum Arthropoda | Basis of Classification |
93%
From NCERT
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The correct statements regarding cyclostomes will be:
1. Only (a) and (b)
2. Only (b) and (c)
3. Only (a) and (d)
4. Only (c) and (d)
| (a) | All living members of the class Cyclostomata are endoparasites in mammals. |
| (b) | Cyclostomes have a sucking and circular mouth without jaws. |
| (c) | Their body is devoid of scales and paired fins. |
| (d) | Cranium and vertebral column are bony. |
2. Only (b) and (c)
3. Only (a) and (d)
4. Only (c) and (d)
Subtopic: General Introduction: Vertebrates & Agnatha |
89%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Hemichordates | Worm like with proboscis, collar and trunk |
| 2. | Mollusca | External skeleton of shell usually present |
| 3. | Porifera | Body with pores and canals in walls |
| 4. | Arthropoda | Exoskeleton of cellulose and jointed appendages |
Subtopic: Phylum Arthropoda |
87%
From NCERT
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Tissue level of body organization and absence of organ systems is seen in:
1. Cnidaria and Ctenophora
2. Porifera and Cnidaria
3. Aschelminthes and Porifera
4. Echinodermata and Chordata
1. Cnidaria and Ctenophora
2. Porifera and Cnidaria
3. Aschelminthes and Porifera
4. Echinodermata and Chordata
Subtopic: Phylum Coelenterata | Phylum Ctenophora & Platyhelminthes | Basis of Classification |
88%
From NCERT
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All the following features will be applicable to the animals belonging to Class Reptilia except:
| 1. | They are mostly terrestrial animals and their body is covered by dry and cornified skin, epidermal scales or scutes. |
| 2. | They do not have external ear openings and tympanum represents ear. |
| 3. | Heart is usually four-chambered, but three-chambered in crocodiles. |
| 4. | Fertilisation is internal and development is direct. |
Subtopic: Study of Reptilia |
90%
From NCERT
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In cartilaginous fishes:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Males bear claspers on pelvic fins. |
| II: | Viviparity is never seen. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
78%
From NCERT
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How many of the given statements regarding mammals are correct?
| I: | The skin of mammals is unique in possessing hair. |
| II: | They are homoiothermous. |
| III: | Different types of teeth are present in the jaw. |
| IV: | External ears or pinnae are absent. |
| V: | The most unique mammalian characteristic is the presence of mammary glands. |
| VI: | Flight has never evolved in any mammal. |
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
Subtopic: Basis of Classification:I | Study of Aves & Mammals |
77%
From NCERT
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Subtopic: Basis of Classification |
77%
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What would be true [T] or false [F] regarding amphibians?
| I: | Skin is moist and without scales. |
| II: | Eyes have eyelids. |
| III: | A tympanum represents the ear. |
| IV: | Respiration is by gills, lungs and through skin. |
| I | II | III | IV | |
| 1. | T | T | F | F |
| 2. | F | F | F | T |
| 3. | T | F | T | T |
| 4. | T | T | T | T |
Subtopic: Study of Amphibians |
83%
From NCERT
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Consider the two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Chondrichthyes lack the capacity to regulate their body temperature. |
| Statement II: | Osteichthyes have the capacity to regulate their body temperature. |
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
71%
From NCERT
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