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Q. No.Notochord is a:
1.
endodermally derived rod-like structure formed on the dorsal side during embryonic development in some animals.
2.
endodermally derived rod-like structure formed on the ventral side during embryonic development in some animals.
3.
mesodermally derived rod-like structure formed on the dorsal side during embryonic development in some animals.
4.
mesodermally derived rod-like structure formed on the ventral side during embryonic development in some animals.
Subtopic: Phylum Chordata |
82%
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What would not be true for cyclostomes?
| 1. | All are endoparasites on some fishes. |
| 2. | They have aa circular mouth without jaw. |
| 3. | Body is devoid of scales and paired fins. |
| 4. | Circulation is of closed type. |
Subtopic: Phylum Chordata |
70%
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Homoiothermy and a four chambered muscular heart is seen in:
| I: | Mammals |
| II: | Crocodiles |
| III: | Birds |
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Study of Aves & Mammals |
68%
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A ‘sea-horse’ is a:
| 1. | marine bony fish |
| 2. | fresh water bony fish |
| 3. | cartilaginous fish |
| 4. | cyclostome |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Osteichthyes |
76%
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Subtopic: Phylum Chordata |
85%
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The members of which of the following animal phyla are not exclusively marine?
1. Porifera
2. Ctenophora
3. Echinodermata
4. Hemichordata
1. Porifera
2. Ctenophora
3. Echinodermata
4. Hemichordata
Subtopic: Phylum Porifera |
76%
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Unlike roundworms, flatworms:
1. are triploblastic
2. exhibit bilateral symmetry
3. do not have a coelom
4. reproduce only by sexual methods
Subtopic: Phylum Platyhelminthes |
76%
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The human liver fluke:
| 1. | is a cestode and requires two intermediate hosts – a cow and a pig |
| 2. | is a trematode and requires two intermediate hosts – a chicken and a fish |
| 3. | is a nematode and requires two intermediate hosts – a fish and a pig |
| 4. | is a trematode and requires two intermediate hosts – a snail and a fish |
Subtopic: Phylum Ctenophora |
64%
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Regarding birds, the number of correct statements from the statements given will be:
| I: | The forelimbs are modified into wings. |
| II: | Flightless birds do not have feathers. |
| III: | Skin is dry without glands except the oil gland at the base of the tail. |
| IV: | Endoskeleton is fully ossified (bony) and the long bones are hollow with air cavities (pneumatic). |
| V: | The hind limbs generally have scales. |
1. 2
2. 3
3. 4
4. 5
Subtopic: Study of Aves & Mammals |
72%
From NCERT
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Which of the following statements are NOT true for the phylum-Chordata?
1. Only (c) and (d)
2. Only (a) and (b)
3. Only (b) and (e)
4. Only (c) and (e)
| (a) | In Urochordata, notochord extends from head to tail and is present throughout their life |
| (b) | In Cephalochordata, notochord is present only in larval tail |
| (c) | Central nervous system is dorsal and hollow |
| (d) | Anus is terminal |
| (e) | Heart, if present, is ventral |
2. Only (a) and (b)
3. Only (b) and (e)
4. Only (c) and (e)
Subtopic: Phylum Chordata |
78%
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