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Q. No.Identify the correct statement regarding classification of chordates:
1.
Vertebrata is a subphylum; Agnatha is a division and Pisces is a super-class
2.
Vertebrata is a supraphylum; Agnatha is a phylum and Pisces is a super-class
3.
Vertebrata is a subphylum; Agnatha is a division and Pisces is a class
4.
Vertebrata is a subphylum; Agnatha is a super-class and Pisces is a class
Subtopic: Phylum Chordata |
66%
From NCERT
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Statocysts, present in some animals, help directly in:
1. Locomotion
2. Respiration
3. Feeding
4. Balancing
1. Locomotion
2. Respiration
3. Feeding
4. Balancing
Subtopic: Phylum Arthropoda |
91%
From NCERT
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Neural system consists of paired ganglia connected by lateral nerves to a double ventral nerve cord in:
1. Hydra
2. Cephalochordates
3. Amphibians
4. Annelids
1. Hydra
2. Cephalochordates
3. Amphibians
4. Annelids
Subtopic: Phylum Annelida |
78%
From NCERT
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Planaria, an organism that possesses high regeneration capacity, belongs to:
1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Echinodermata
1. Porifera
2. Cnidaria
3. Platyhelminthes
4. Echinodermata
Subtopic: Phylum Ctenophora & Platyhelminthes |
94%
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The correct statements regarding Platyhelminthes will be:
a. All living members of the phylum are parasites.
b. They lack a true coelom but have a pseudo coelom.
c. Body is dorso-ventrally flattened.
d. They exhibit bilateral symmetry.
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 phylum are parasites.
b. They lack a true coelom but have a pseudo coelom.
c. Body is dorso-ventrally flattened.
d. They exhibit bilateral symmetry.
1. Only [a] and [b]
2. Only [b] and [c]
3. Only [a] and [d]
4. Only [c] and [d]
Subtopic: Phylum Ctenophora & Platyhelminthes |
87%
From NCERT
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Regarding mammals:
1. Only I and II are correct
2. Only III and IV are correct
3. Only I and III are correct
4. Only II and IV are correct
| I: | The most unique characteristic is the presence of mammary glands. |
| II: | Skin is unique in possessing hair. |
| III: | Heart is unique in being four-chambered. |
| IV: | Viviparity is a unique feature. |
1. Only I and II are correct
2. Only III and IV are correct
3. Only I and III are correct
4. Only II and IV are correct
Subtopic: Study of Aves & Mammals |
88%
From NCERT
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Sponges:
1. Only I and II are correct
2. Only II and III are correct
3. Only III and IV are correct
4. Only I and IV are correct
| I: | are exclusively marine and mostly asymmetrical animals. |
| II: | have cellular level of organisation. |
| III: | have a water transport or canal system. |
| IV: | have extracellular digestion. |
2. Only II and III are correct
3. Only III and IV are correct
4. Only I and IV are correct
Subtopic: Phylum Porifera |
84%
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Correctly identify the labelled parts of a hypothetical chordate showing the characteristics of chordate in the given figure:
| A | B | C | D | |
| 1 | Nerve cord |
Notochord | Gill slits | Terminal anus |
| 2 | Notochord | Nerve cord | Gill slits | Post anal tail |
| 3 | Nerve cord |
Notochord | Gill slits | Post anal tail |
| 4 | Notochord | Nerve cord | Muscle myotome |
Terminal anus |
Subtopic: Phylum Chordata |
77%
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| Assertion (A): | Aschelminthes are called round worms. |
| Reason (R): | The body of the aschelminthes is circular in cross-section. |
| 1. | (A) is True but (R) is False. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Phylum Aschelminthes |
90%
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The number of incorrect statement(s) from the given statements is/are:
1. 0
2. 1
3. 3
4. 4
| A: | Unlike platyhelminthes, annelids have an incomplete digestive system. |
| B: | Unlike arthropods, annelids have an open circulatory system. |
| C: | Unlike aschelminthes, annelids have a pseudocoelom. |
| D: | Unlike chordates, the body of annelids is not metamerically segmented. |
2. 1
3. 3
4. 4
Subtopic: Basis of Classification |
72%
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