Select Chapter Topics:
Q. No.Consider the two statements:
Statement I:
All vertebrates are chordates but all chordates are not vertebrates.
Statement II:
Besides the basic chordate features, all vertebrates have at least a three-chambered heart and paired appendages.
1.
Both Statement I and Statement II are correct but Statement II does not explain Statement I.
2.
Statement I is correct and Statement II is incorrect.
3.
Both Statement I and Statement II are incorrect.
4.
Both Statement I and Statement II are correct and Statement II explains Statement I.
Subtopic: Phylum Chordata |
69%
Level 2: 60%+
Hints
The number of correct statements from the given statements, regarding the members of Class Cyclostomata, is:
| (a) | All living members are ectoparasites on some fishes. |
| (b) | The body bears 6-15 pairs of gill slits for respiration. |
| (c) | They have a sucking and circular mouth without jaws. |
| (d) | Their body is devoid of scales and paired fins. |
| (e) | Cranium and vertebral column are bony. |
| (f) | Circulation is of open type. |
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
Subtopic: General Introduction: Vertebrates & Agnatha | Class Cyclostomata |
60%
Level 2: 60%+
Hints
Regarding reproduction in Cyclostomes:
| I: | They are marine but migrate for spawning to fresh water. |
| II: | After spawning, within a few days, they die. |
| III: | Their larvae, after metamorphosis, return to the ocean. |
| 1. | Only II is correct |
| 2. | Only I and II are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: General Introduction: Vertebrates & Agnatha | Class Cyclostomata |
86%
Level 1: 80%+
Hints
Chondrichthyes:
| 1. | are marine animals and have cartilaginous endoskeleton |
| 2. | have a mouth located dorsally |
| 3. | have teeth that are modified cycloid or ctenoid scales directed backwardly |
| 4. | have the capacity to regulate their body temperature |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
75%
Level 2: 60%+
Hints
What would not be true regarding cartilaginous fishes?
| 1. | In males, pelvic fins bear claspers |
| 2. | Some of them have electric organs [Torpedo] |
| 3. | None of them is viviparous |
| 4. | Some possess poison sting [Trygon] |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
81%
Level 1: 80%+
Hints
Identify the incorrect statement regarding bony fishes:
| I: | They have four pairs of gills which are covered by an operculum on each side. |
| II: | Due to the absence of air bladder, they have to swim constantly to avoid sinking. |
| III: | Skin is covered with placoid scales. |
| IV: | Mouth is mostly terminal. |
| 1. | Only II | 2. | Only II and III |
| 3. | Only I and IV | 4. | Only IV |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
62%
Level 2: 60%+
Hints
Which of the following is not a characteristic of Amphibians?
| 1. | Most have two pairs of limbs and tail is present in some. |
| 2. | Alimentary canal, urinary and reproductive tracts open into a common chamber called cloaca which opens to the exterior. |
| 3. | Respiration is by gills, lungs and through skin. |
| 4. | The heart is two chambered with one atrium and one ventricle. |
Subtopic: Study of Amphibians |
77%
Level 2: 60%+
Hints
In reptiles:
| I: | Body is covered by dry and cornified skin, dermal scales or scutes. |
| II: | External ear is not present and tympanum represents the ear. |
| III: | Scales are shed as skin cast in all members. |
| IV: | Fertilization is internal and development is direct. |
| 1. | Only II is correct | 2. | Only II and IV are correct |
| 3. | All are correct | 4. | Only I and II are incorrect |
Subtopic: Study of Reptilia |
Level 3: 35%-60%
Hints
Which of the following reptiles has a four chambered heart?
| 1. | Crocodile | 2. | Wall lizard |
| 3. | Turtle | 4. | Tortoise |
Subtopic: Study of Reptilia |
91%
Level 1: 80%+
Hints
In birds:
| a: | the characteristic feature is the presence of feathers. |
| b: | forelimbs are modified into wings. |
| c: | flight is present in all members. |
| d: | hind limbs do not have scales. |
| 1. | Only (a) and (d) are incorrect |
| 2. | Only (c) and (d) are correct |
| 3. | (a), (b) and (c) are correct |
| 4. | Only (a) and (b) are correct |
Subtopic: Study of Aves & Mammals |
80%
Level 1: 80%+
Hints
Select Chapter Topics:
© 2026 GoodEd Technologies Pvt. Ltd.