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Q. No.How many of the given statements are correct?
I.
Cartilaginous fishes have cycloid or ctenoid scales.
II.
An air bladder is present in bony fishes.
III.
Amphibians have three-chambered heart.
IV.
Reptiles have dermal scales.
V.
Birds are warm-blooded.
1. 2
2. 3
3. 4
4. 5
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Study of Amphibians | Study of Reptilia | Study of Aves & Mammals |
From NCERT
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Which group of animals belong to the same phylum?
| 1. | Portuguese men-of-war, sea anemone, and brain coral. |
| 2. | Tapeworm, roundworm, and hookworm. |
| 3. | Pearl oyster, devil fish, and flying fish. |
| 4. | Sea urchin, sea cucumber, and sea pen. |
Subtopic: Phylum Coelenterata |
83%
From NCERT
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Identify the incorrect statement:
| 1. | A cnidoblast is seen in Cnidaria |
| 2. | Bioluminescence is well developed in some Ctenophores |
| 3. | Protonephridia are excretory and osmoregulatory structures in flatworms |
| 4. | Nematodes have a true coelom |
Subtopic: Phylum Coelenterata | Phylum Ctenophora & Platyhelminthes | Phylum Aschelminthes |
81%
From NCERT
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Consider the given two statements:
| Assertion (A): | Protochordates and Hemichordates are not chordates. |
| Reason(R): | In protochordates, the notochord is not present throughout their life, while in hemichordates, notochord is not present at all. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Phylum Hemichordata | Phylum Chordata |
69%
From NCERT
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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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