What adaptation of bony fish allows them to detect and orient themselves in the upstream direction?
1. The swim bladder
2. Lobed fins
3. Operculum
4. Lateral line system
Subtopic: Â Comparative study of Cartilagenous & Bony Fishes |
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A mantle is
1. Present only in bivalves molluscs
2. A structure that act as a lung or contain gills
3. A rasping tongue like organ is molluscs
4. Necessary for molluscs to be motile
1. Present only in bivalves molluscs
2. A structure that act as a lung or contain gills
3. A rasping tongue like organ is molluscs
4. Necessary for molluscs to be motile
Subtopic: Â Phylum Mollusca |
 60%
From NCERT
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Which of the following character is not applicable for reptiles?
1. Mostly terrestrial
2. Body is covered with dry and cornfield skin
3. Paired limbs are present
4. Absence of tympanum.
1. Mostly terrestrial
2. Body is covered with dry and cornfield skin
3. Paired limbs are present
4. Absence of tympanum.
Subtopic: Â Study of Reptilia |
 76%
From NCERT
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Some characteristic of animals are given below-
i. Notochord is present in the embryonic as well as adult form
ii. Animals have closed or open circulatory system
iii. Animals show bilateral symmetry
iv. Animals are always triplobastic and coelomates
The characteristic that apply to chordates are
1. (i), (ii), (iii) and (iv)
2. (i), (ii) and (iii)
3. (ii), (iii) and (iv)
4. Only (iii) and (iv)
i. Notochord is present in the embryonic as well as adult form
ii. Animals have closed or open circulatory system
iii. Animals show bilateral symmetry
iv. Animals are always triplobastic and coelomates
The characteristic that apply to chordates are
1. (i), (ii), (iii) and (iv)
2. (i), (ii) and (iii)
3. (ii), (iii) and (iv)
4. Only (iii) and (iv)
Subtopic: Â Phylum Chordata |
From NCERT
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In the following questions a statement of assertion (A) is followed by
a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A. Reptiles are similar to Aves in the term of development
R. Both are strictly oviparous and lay cleiodic eggs.
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
A. Reptiles are similar to Aves in the term of development
R. Both are strictly oviparous and lay cleiodic eggs.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Â Study of Reptilia |Â Study of Aves & Mammals |
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A:
All the vertebrates are essentially also a chordates.
R: In an the chordate notochord appear first and further it is replaced with vertebral column.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: In an the chordate notochord appear first and further it is replaced with vertebral column.
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Â Phylum Chordata |Â Study of Aves & Mammals |
From NCERT
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A:
All the mammals are endotherm.
R: Mammals possess four chambered heart and respire through lungs
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
R: Mammals possess four chambered heart and respire through lungs
In the following questions a statement of assertion (A) is followed by a statement of reason (R).
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
3. If Assertion is true statement but Reason is false, then mark (3)
4. If both Assertion and Reason are false statements, then mark (4)
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
 73%
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Exclusively marine, radially symmetrical, and diploblastic organism is:
1. Pila
2. Nereis
3. Pleurobrachia
4. Asterias
1. Pila
2. Nereis
3. Pleurobrachia
4. Asterias
Subtopic: Â Phylum Ctenophora & Platyhelminthes |
 82%
From NCERT
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Match List I with List II:
Choose the correct answer from the options given below:
1. A -II, B- IV, C-III, D-II
2. A -IV, B- II, C-III, D-I
3. A -III, B- IV, C-II, D-I
4. A -III, B- IV, C-I, D-II
| List I | List II |
| A. Bilaterally symmetrical, triploblastic acoelomate animal with flame cells | I. Limulus |
| B. Bilaterally symmetrical animal with calcareous shell and mantle cavity | II. Pleurobrachia |
| C. Radically symmetrical animal with ciliated comb plates and exclusively marine | III. Fasciola hepatica |
| D. Bilaterally symmetrical, triploblastic, coelomate animals with a chitinous exoskeleton | IV. Dentalium |
Choose the correct answer from the options given below:
1. A -II, B- IV, C-III, D-II
2. A -IV, B- II, C-III, D-I
3. A -III, B- IV, C-II, D-I
4. A -III, B- IV, C-I, D-II
Subtopic: Â Phylum Ctenophora & Platyhelminthes |Â Phylum Arthropoda |Â Phylum Mollusca |
 89%
From NCERT
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Asterias lacks specific locomotory, respiratory, and food-capturing organs but it can carry these functions through a unique system of:
1. Syconoid canal system
2. Water vascular system
3. Metamerism
4. Segmentation
1. Syconoid canal system
2. Water vascular system
3. Metamerism
4. Segmentation
Subtopic: Â Phylum Echinodermata |
 90%
From NCERT
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