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Q. No.Consider the given two statements:
Statement I:
Protochordates are exclusively marine.
Statement II:
In Urochordata, notochord is present only in larval tail, while in Cephalochordata, it extends from head to tail region and is persistent throughout their life.
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Phylum Chordata |
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All the following animals are Urochordates except:
1. Ascidia
2. Salpa
3. Doliolum
4. Branchiostoma
1. Ascidia
2. Salpa
3. Doliolum
4. Branchiostoma
Subtopic: Phylum Chordata |
88%
From NCERT
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In chondrichthyes:
| 1. | Mouth is ventral, teeth are modified ctenoid scales and directed forwards. |
| 2. | Mouth is ventral, teeth are modified placoid scales and directed backwards. |
| 3. | Mouth is dorsal, teeth are modified ctenoid scales and directed forwards. |
| 4. | Mouth is dorsal, teeth are modified placoid scales and directed backwards. |
Subtopic: Comparative study of Cartilagenous & Bony Fishes |
81%
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In birds:
| I: | The digestive tract of birds has additional chambers, the crop and gizzard. |
| II: | Air sacs connected to lungs supplement respiration. |
| III: | They possess beak with teeth. |
| 1. | Only I and II are correct | 2. | Only I and III are correct |
| 3. | Only II and III are correct | 4. | I, II and III are correct |
Subtopic: Study of Aves & Mammals |
73%
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Identify the incorrect statement regarding reptiles:
| 1. | They are mostly aquatic animals and their body is covered by dry and cornified skin, dermal scales or scutes. |
| 2. | They do not have external ear openings. Tympanum represents ear. |
| 3. | Heart is usually three-chambered, but four-chambered in crocodiles. |
| 4. | They are oviparous and development is direct. |
Subtopic: Study of Reptilia |
71%
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In amphibians cloaca is the common chamber and outlet into which open the:
I: gastrointestinal tract
II: urinary tract
III: genital tract
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
I: gastrointestinal tract
II: urinary tract
III: genital tract
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Study of Amphibians |
76%
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Animals belonging to phylum Chordata are fundamentally characterised by:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | the presence of a notochord, a dorsal hollow nerve cord and paired pharyngeal gill slits. |
| II: | bilateral symmetry, triploblastic body organisation, true coelom with organ-system level of organisation. |
| III: | a post anal tail and a closed circulatory system. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Phylum Chordata |
82%
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Consider the given two statements:
| Assertion (A): | Hemichordata was earlier considered as a sub-phylum under phylum Chordata but now it is placed as a separate phylum under non-chordata. |
| Reason (R): | Hemichordates have a rudimentary structure in the collar region called stomochord, a structure analogous to notochord. |
| 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. | (A) is False but (R) is True. |
Subtopic: Phylum Hemichordata |
71%
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How many of the given statements regarding Mollusca are true?
1. 1
2. 2
3. 3
4. 4
| I: | They are bilaterally symmetrical, triploblastic and coelomate animals. |
| II: | Body is covered by a calcareous shell and is segmented with a distinct head, muscular foot and visceral hump as metameres. |
| III: | A soft and spongy layer of skin forms a mantle over the visceral hump. |
| IV: | They are usually dioecious and oviparous with indirect development. |
2. 2
3. 3
4. 4
Subtopic: Phylum Mollusca |
57%
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Radula, a tongue rasping like organ, is characteristically seen in most:
| 1. | Annelids | 2. | Mollusca |
| 3. | Round worms | 4. | Arthropods |
Subtopic: Phylum Mollusca |
92%
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