Which one of the following features are not true for chordates?
(a) Heart is dorsal.
(b) Pharynx is perforated by gill slits.
(c) Central nervous system is ventral, solid and single.
(d) Post-anal tail is present.
(e) Notochord is present.
Choose the most appropriate answer from the option given below:
1.
(e) only
2.
(a), (d) and (c) only
3.
(b) and (c) only
4.
(a) and (c) only
(a) Heart is dorsal.
(b) Pharynx is perforated by gill slits.
(c) Central nervous system is ventral, solid and single.
(d) Post-anal tail is present.
(e) Notochord is present.
Choose the most appropriate answer from the option given below:
Subtopic: Â Phylum Chordata |Â Comparative study of Cartilagenous & Bony Fishes |
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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
1. The swim bladder
2. Lobed fins
3. Operculum
4. Lateral line system
Subtopic: Â Comparative study of Cartilagenous & Bony Fishes |Â Class Osteichthyes |
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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 |
Subtopic: Â Phylum Mollusca |
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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. |
Subtopic: Â Study of Reptilia |
 77%
From NCERT
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Some characteristic of animals are given below-
The characteristic that apply to chordates are
| 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 |
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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. |
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) |
Subtopic: Â Phylum Chordata |Â Study of Aves & Mammals |
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Given below are two statements:
| Assertion (A): | All the mammals are endotherm. |
| Reason (R): | Mammals possess four chambered heart and respire through lungs |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Study of Aves & Mammals |
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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 |
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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 |Â Phylum Arthropoda |Â Phylum Mollusca |
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