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Q. No.Why are crocodiles not considered warm-blooded despite having a four-chambered heart?
1.
They lack the ability to internally regulate their body temperature.
2.
Their four-chambered heart is not efficient in thermoregulation.
3.
They are warm-blooded, but their temperature regulation is different from mammals.
4.
The four-chambered heart is only related to oxygenation of blood, not temperature regulation.
Subtopic: Study of Reptilia |
69%
From NCERT
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Which statement about circulatory systems is correct?
| 1. | All vertebrates have an open circulatory system. |
| 2. | Invertebrates have a closed circulatory system, while vertebrates have an open system. |
| 3. | Mollusks and arthropods typically exhibit a closed circulatory system. |
| 4. | Mammals have a closed circulatory system, while insects have an open system. |
Subtopic: Phylum Chordata | Basis of Classification |
91%
From NCERT
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Which of the following is a difference between invertebrates and chordates?
| 1. | Chordates have a ventral heart, while invertebrates have a ventral nerve cord, when present . |
| 2. | Invertebrates are capable of flight, while chordates cannot fly. |
| 3. | All invertebrates are aquatic; chordates are not. |
| 4. | Invertebrates are cold-blooded, while all chordates are warm-blooded. |
Subtopic: Phylum Chordata |
87%
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 salient features of Ctenophora include:
| 1. | Radial symmetry and presence of a water vascular system |
| 2. | Bilateral symmetry and absence of nematocysts |
| 3. | Radial symmetry and bioluminescence |
| 4. | Bilateral symmetry and presence of a coelom |
Subtopic: Phylum Ctenophora & Platyhelminthes |
97%
From NCERT
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Which statement accurately describes a feature of Aves (birds)?
| 1. | They have a four-chambered heart and are endothermic. |
| 2. | They are ectothermic with scales covering their body. |
| 3. | They possess a notochord throughout their life. |
| 4. | They have an open circulatory system. |
Subtopic: Study of Aves & Mammals |
86%
From NCERT
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Which of the following statements accurately describes the differences between Mollusca and Annelida?
| 1. | Mollusca are segmented, while Annelida are not |
| 2. | Mollusca have a coelom, while Annelida do not |
| 3. | Mollusca have an open circulatory system, while Annelida have a closed circulatory system |
| 4. | Mollusca are primarily terrestrial, while Annelida are aquatic |
Subtopic: Phylum Annelida | Phylum Mollusca |
92%
From NCERT
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Match the following biological names with their common names:
1. A-ii, B-iii, C-iv, D-i
2. A-i, B-ii, C-iii, D-iv
3. A-iii, B-iv, C-i, D-ii
4. A-iv, B-i, C-ii, D-iii
| Column I | Column II | ||
| A. | Asterias | i. | Earthworm |
| B. | Pila | ii. | Starfish |
| C. | Periplaneta | iii. | Snail |
| D. | Pheretima | iv. | Cockroach |
1. A-ii, B-iii, C-iv, D-i
2. A-i, B-ii, C-iii, D-iv
3. A-iii, B-iv, C-i, D-ii
4. A-iv, B-i, C-ii, D-iii
Subtopic: Phylum Annelida | Phylum Mollusca | Phylum Echinodermata |
98%
From NCERT
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What are the main differences between Chondrichthyes and Osteichthyes?
| 1. | Chondrichthyes have a bony skeleton, while Osteichthyes have a cartilaginous skeleton. |
| 2. | Chondrichthyes are primarily freshwater fish, while Osteichthyes are mainly marine. |
| 3. | Chondrichthyes have an operculum covering the gills, while Osteichthyes do not. |
| 4. | Chondrichthyes have a cartilaginous skeleton, while Osteichthyes have a bony skeleton. |
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
88%
From NCERT
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Which of the following is not a feature of Mollusca?
1. Only I, II and III
2. Only IV
3. Only I and IV
4. Only II and III
| I: | Bilateral symmetry |
| II: | Presence of a mantle |
| III: | Radula for feeding |
| IV: | Chitinous exoskeleton |
1. Only I, II and III
2. Only IV
3. Only I and IV
4. Only II and III
Subtopic: Phylum Mollusca |
81%
From NCERT
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