Solved MCQs on
Fishes
1. Adaptive radiation in fishes started about number of million
years ago:
(a)
1200
(b)
500
(c)
1000
(d) 1500
(b)
500
2. Bony armor fishes are:
(a) Placoderms
(b) Ostracoderms
(c) Elasmobranchs
(d) None
(b) Ostracoderms
3. The fish remained buried in the mud and sand is:
(a) Ostracoderms
(b)
Lamprey
(c) Hag Fishes
(d) Sharks
(c) Hag Fishes
4. Sucking mouth and rasping tongue is present in :
a) Ostracoderms
(b) Hag fishes
(c) Lampreys
(d) Sharks
(c) Lampreys
5. The larva of Lamprey is:
(a)
Trochophore
(b)
Tadpole
(c) Ammocoete
(d) Tonaria
(c)
Ammocoete
6. The number of semicircular canals in Gnathostomes are:
(a)
2
(b)
3
(c)
4
(d) 5
(b)
3
7. The armored fishes are:
(a) Chondrichthyes
(b) Osteichtliyes
(c) Placoderms
(d) Acanthodians
(c) Placoderms
8. The extinct body fishes are:
(a) Chondrichthyes
(b) Osteichthyes
(c) Placoderms
(d) Acanthodians
(d) Acanthodians
9. Cartilaginous fishes are:
(a) Placoderms
(b) Acanthodians
(c) Chindrichythyes
(d) Osteichthyes
(c) Chindrichythyes
10. Placoid scales are present in:
(a)
Salmons
(b)
Lamprey
(c)
Sharks
(d) Hag Fishes
(c)
Sharks
11. Rat fishes are:
(a)
Salmons
(b)
Lamprey
(c) Sharks
(d) Chimeras
(d) Chimeras
12. Number of species of Osteichthyes are:
( a) 10,
000
(b) 15,
000
(c) 20, 000
(d) 25,000
(b) 15,
000
13. The lung fish found in tropical Africa is:
(a)
Neoceratodus
(b) 15,
000
(c)
Lepidosiren
(d) None
(b) 15,
000
14. The fish live in stagnant water is:
(a)
Lepidosiren
(b)
Protopterus
(c)
Neoceratodus
(d) None
(c)
Neoceratodus
15. Which fish of the following aestivate?
( a)
Neoceratodus
(b)
Protopterus
(c) Lepidosiren
(d) None
(c)
Lepidosiren
16. Which fish is important for
caviar?
(a)
Lepidosiren
(b)
Protopterus
(c)
Neoceratodus
(d) Sturecons
(d) Sturecons
17. The number of species of teleosts fishes are:
(a)
10.000
(b)
15.000
(c )
20.000
(d) 25.000
(c )
20.000
18. Large rostrum is found in:
(a) Paddle
fishes
(b)
Lamprey
(e)
Sharks
(d) Chimeras
(a) Paddle
fishes
19. The number of chambers in the
heart of fishes are:
(a)
1
(b)
2
(c)
3
(d) 4
(b)
2
20. Number of afferent vessels are:
(a)1
(b)
2
(c)
4
(d) 5
(d) 5
21. Which of the followings aortic arches form pulmonary artery in
lung fishes?
(a)
(b)
IV
(c)
V
(d) VI
(d) VI
22. The major osmoregulatory organ in fishes is:
(a)
Gills
(b)
Kidney
(c)
Liver
(d) Stomach
(b)
Kidney
23. Elasmobranchs remove sodium chloride through:
(a)
Gills
(b)
Kidney
(c)
Liver
(d) Rectal glands
(d) Rectal glands
24. Some elasmobranchs have modified pelvic fin for copulation called:
(a)
Penis
(c)
Cloaca
(c)
Clasper
(d) None
(c) Clasper
25. Which of the following fishes is viviparous?
(a)
Salmons
(b)
Lamprey
(c)
Sharks
(d) Chimeras
(c)
Sharks
Fill in the blanks
1. Cladistic analysis indicates that _____________
are the most primitive vertebrates.
2. The fossils of the group of ancient animal
__________ were discovered. Conodonts were eel-like animals.
3. The mouth of__________ has four pairs of
tentacles.
4. Members of the genus 1,ampetra are called brook
_____________
5. Eggs are hatched in three weeks and ____________
larvae are thrmed in lamprey.
6. ______ of teeth
are adapted for tearing prey or for crushing the shells of molluscs.
7. ____________lives in fresh waters of
Queensland. Australia.
8. ________ is a
dormant state that helps an animal to withstand hot, dry periods.
9. Most stureeons live in the sea. The migrate into
rivers to_______________
10. Sharks and other elasmobranchs have avalve in
their intestine.
11. Oxygenation takes
place and blood is collected by_______ vessels.
12. The ________ flow is called countercurrent
mechanism.
13.______________ is a blood vascular network.
14. _____________ is the detection of electrical
fields that the fish or another generates in the
environment.
15. The elasmobranchs possess a _______ gland. It
removes excess sodium chloride from the blood into the cloaca.
Answer Key:
1. Hag
Fishes
2.
Conodonts
3. Myxini
4. Lampreys
5.
Ammocoete
6. Crowns
7. Neoceratodus 8.Aestivation
9.
Breed
10.
Spiral
11.
efferent
12. Opposite
13. Rete mirable 14.
Electroreception 15. Rectal
True/ False
1. Cladistic analysis indicates that body fishes are
the most primitive vertebrates.
2. The fossils of the group of ancient animal
conodonts were discovered. Conodonts were eel-like animals.
3. The mouth of myxini has 7 pairs of tentacles.
4. Members of the genus Lampetra are called book
lampreys.
5. Egg are hatched in three weeks and ammocoete larvae
are formed in lamprey.
6. Root of teeth are adapted for tearing prey or for
crushing the shells of molluscs.
7. Neoceratodus lives in fresh waters of Queensland.
Australia.
8. Hiberrnation is a dormant state that helps an
animal to withstand hot. dry periods.
9. Most sturgeons live in the sea. They migrate into
rivers to breed.
10. Sharks and other elasmobranchs have a spiral
valve in their intestine.
11. Oxygenation takes place and blood is collected by
afferent vessels.
12. This opposite flow is called countercurrent
mechanism.
13. Rete mirabile is a blood vascular network.
14. Electroreception is the detection of electrical
fields that the fish or another organism generates in the environment.
15. The elasmobranchs possess a rectal gland. It
removes excess sodium chloride from the blood into the cloaca.
Answer Key:
1. F:
Hag
2. T
3. F :4
4. F:
brook
5. T
6.
F:Crowns
7. T 8. F:
Aestivation 9. T
10. T
11. F:
efferent
12.
T
13. T
14. T
15. T
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