- 1(current)
Q. No.Match items in column-I with those in column-II and choose the correct option.
| Column-I | Column-II | ||
| A. | Cyclostomata | (i) | Mouth without jaws |
| B. | Chondrichthyes | (ii) | Exclusively oviparous |
| C. | Aves | (iii) | Gills without operculum |
| D. | Mammalia | (iv) | Unique in possessing hair |
| A | B | C | D | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (i) | (iii) | (ii) | (iv) |
| 4. | (ii) | (i) | (iv) | (iii) |
Subtopic: Â Phylum Chordata |Â Comparative study of Cartilagenous & Bony Fishes |Â Study of Aves & Mammals |
 87%
Level 1: 80%+
Hints
Read the following statements (A) and (B) with respect to bony fishes and choose the correct answer from the following given options.
| Statement (A): | Osteichthyes includes both marine and freshwater fishes with a bony endoskeleton. |
| Statement (B): | Their body is streamlined and their mouth is ventral in position. |
| 1. | Both statements (A) and (B) are correct. |
| 2. | Only statement (A) is incorrect. |
| 3. | Both statements (A) and (B) are incorrect. |
| 4. | Only statement (B) is incorrect. |
Subtopic: Â Comparative study of Cartilagenous & Bony Fishes |Â Class Osteichthyes |
 61%
Level 2: 60%+
Hints
Read the following statements carefully with respect to taxon vertebrata.
Choose the option with only incorrect statements.
| a. | Phylum vertebrata is divided into two superclasses - Pisces and Tetrapoda. |
| b. | Superclass Pisces includes cyclostomes, cartilaginous and bony fishes. |
| c. | In bony fishes, air bladder is present which regulates buoyancy. |
| d. | Body of all amphibians is divisible into head neck and trunk. |
| e. | Both fishes and amphibians are poikilothermous animals. |
| 1. | a, b, c, d | 2. | a, b, c, d, e |
| 3. | a, b, d | 4. | c, d, e |
Subtopic: Â Comparative study of Cartilagenous & Bony Fishes |
 67%
Level 2: 60%+
Hints
Match column -I with column-II and choose the correct option:
| Column-I | Column-II | ||
| a. | Three-chambered heart with one incompletely divided ventricle | (i) | Myxine |
| b. | Jawless vertebrate with a cartilaginous vertebral column | (ii) | Chaetopleura |
| c. | Soft, unsegmented body and has a structure that helps in both respiration and excretion | (iii) | Calotes |
| d. | Ventral mouth, gills without operculum, and skin with placoid scales | (iv) | Scoliodon |
| 1. | a(i), b(ii), c(iii), d(iv) |
| 2. | a(iv), b(iii), c(ii), d(i) |
| 3. | a(ii), b(iv), c(i), d(iii) |
| 4. | a(iii), b(i), c(ii), d(iv) |
Subtopic: Â Phylum Mollusca |Â Phylum Chordata |Â Comparative study of Cartilagenous & Bony Fishes |Â Study of Reptilia |
 84%
Level 1: 80%+
Hints
Match items in column-I with those in column-II and choose the correct option:
| Column-I | Column-II | ||
| a. | Planaria | (i) | Indirect development |
| b. | Ctenoplana | (ii) | Gills are covered by an operculum on each side |
| c. | Petromyzon | (iii) | Possess high regeneration capacity |
| d. | Exocoetus | (iv) | Migrates for spawning to freshwater |
| 1. | a(i), b(ii), c(iii), d(iv) |
| 2. | a(iii), b(iv), c(ii), d(i) |
| 3. | a(iii), b(i), c(iv), d(ii) |
| 4. | a(iii), b(ii), c(i), d(iv) |
Subtopic: Â Phylum Ctenophora |Â Phylum Chordata |Â Comparative study of Cartilagenous & Bony Fishes |
 91%
Level 1: 80%+
Hints
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
|
Column I Feature |
Column II Phylum |
|
(a) Lateral line system (b) Water vascular system (c) Radula (d) Comb plates (e) Parapodia |
(i) Ctenophora (ii) Mollusca (iii) Echinodermata (iv) Osteichthyes (v) Annelida |
Codes
(a) (b) (c) (d) (e)
1. (i) (ii) (iii) (iv) (v)
2. (iv) (iii) (ii) (i) (v)
3. (iv) (iii) (i) (v) (ii)
4. (iii) (ii) (i) (v) (iv)
Subtopic: Â Phylum Ctenophora |Â Phylum Annelida |Â Phylum Mollusca |Â Phylum Echinodermata |Â Comparative study of Cartilagenous & Bony Fishes |
 91%
Level 1: 80%+
Hints
Links
| Assertion (A): | Claspers are present in males of the class Chondrichthyes. |
| Reason (R): | Claspers assist copulation. |
| 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 Comparative study of Cartilagenous & Bony Fishes |Â Class Chondrichthyes |
Level 3: 35%-60%
Hints
- 1(current)
Q. No.
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