Class Osteichthyes MCQs
The following MCQ will give you more information about the topic ‘Class Osteichthyes’.
1.) What is the composition of exoskeleton in Osteichthyes?
a) Calcium carbonate
b) Silica
c) Chitin
d) None
2.) The Agnatha division includes ………………………………………………………………….Vertebrates.
a) Scaly skin
b) Jawed Fishes
c) Spines
d) Jawless Fishes
3.) The gills in flying fish are covered by …………………………………………………………………….
a) Cloaca
b) Membrane
c) Nictitating membrane
d) Operculum
4.) Which of the following is a protective covering of a bony flap?
a) Ganoid
b) Cloaca
c) Brood
d) Operculum
5.) Match the following:
i) Hippocampus a) Rohu
ii) Catlacatlab) Magur
iii) Labeorohitac) Sea horse
iv) Clariasbatrachus d) Katla
a) i)-a), ii)-c), iii)-d), iv)-b)
b) i)-c), ii)-d), iii)-a), iv)-b)
c) i)-a), ii)-b), iii)-d), iv)-c)
d) i)-c), ii)-b), iii)-a), iv)-d)
6.) The name of Lophiusanimal is:
a) Angler Fish
b) Sea Horse
c) All of them
d) Fighting Fish
7.) Exocoetus undergoes which type of development?
a) Direct
b) Indirect
c) Indirect followed by larval stage
d) During unfavorable conditions, undergoes indirect development
8.) In which part does the male Hippocampus incubate eggs?
a) Tail
b)Calcarious shell
c) Brood pouch
d)Neuromasts
9.) A total number of chambers present in the heart of angel fish are:
a) 2
b) 4
c) 3
d) 5
10.) The following are different types of scales present in the Osteichthyes animals EXCEPT?
a)Slanoid
b) Ganoid
c)Ctenoid
d) Cycloid
11) The organ that provides buoyancy to the Magur is ………………………………………………………………………………….
a) Water bladder
b) Coelom
c) Body cavity
d) Air bladder
12.) What is the function of internal ears in fish?
a)Helps to pass food
b) Helps to keep balance
c) Helps to make sound
d) All of above
13.) True or False
Osteichthyes are poikilothermous animals.
a) True
b) False
14.) Carps do not have:
a) Tooth
b) Scales on head
c)Barbels
d) All of them
15.) In catla, skin is covered with …………………………………………………..type of scales.
a) Cycloid
b) Ctenoid
c) Placoid
d) Both (a) & (b)
16.) Which among the following is Mosquito fish?
a)Exocoetus
b)Murrels
c)Anguilla
d)GambusiaAffinis
17.) All of the following statement are correct except.
a) Labeo is fresh water fish
b) Osteichthyes have air bladder
c) Pterophyllum is dog fish
d) sexes are separate
18.) Which of the following fish is marine?
a) Labeo
b) Katla
c) Flying fish
d) All of the above
Answers:
1.)
Solution: d) None
Because they have a bony endoskeletons. They don’t have exoskeletons on their body surface.
2.)
Solution: b) Jawed Fishes
Class Osteichthyes has two divisions which are Aganatha and Gnathostomata. Vertebrates without jaw are included in the Gnathostomata division. On the other side, Aganatha has all the vertebrates with jaws.
3.)
Solution: d) Operculum
The operculum is a bony flap that protects the soft gills from any harm and also opens and closes to allow the water to pass through the gills.
4.)
Solution: d) Operculum
The gills are protected by a covering of a bony flap which is called an Operculum. It is mainly present in bony fishes.
5.)
Solution: b) i)-c), ii)-d), iii)-a), iv)-b)
The Scientific name of the sea horse is Hippocampus, Katla is Catlacatla, Mugur is Clariasbatrachus, and Rohu is Labeorohita.
6.)
Solution: a) Angler Fish
All the options that are given are examples of bony fishes. Sea horse is also known as Hippocampus and Betta splendens is a Fighting fish. Hence, Sea horse is the correct answer.
7.)
Solution: a) Direct
Flying fish undergoes direct development as there is no intermediate larval stage involved to reach adulthood.
8.)
Solution: c) Brood pouch
The Brood pouch is present in the male sea horse which is also called as Hippocampus. Incubating eggs inside the abdomen is the function of a male animals.
9.)
Solution: a) 2
The heart is two-chambered in angel fish which consists of one auricle and one ventricle.
10.)
Solution: a) Slanoid
The slanoid is not included in the types of scales in Osteichthyes. Whereas, remaining cycloid, ganoid, or ctenoid are present in the exoskeleton of these animals.
11.)
Solution: d) Air bladder
The air bladder contains air to regulate buoyancy so that the organism does not sink even when it’s not swimming.
12.)
Solution: b) Helps to keep balance
External opening on the head of the fish is absent. But, the fishes have internal ears through which they hear and keep balance.
13.)
Solution: a) True
They are cold-blooded animals who cannot maintain a constant body temperature because they will expend too much energy on the body.
14.)
Solution: d) All of them
All the options are correct because the toothless mouth is present in the carps. As well as, the head does not contain scales and barbels are generally not present in them.
15.)
Solution: d) Both (a) & (b)
Cycloid or Ctenoid scales protect the body of fish from predators and against environmental stresses.
16.)
Solution: d) GambusiaAffinis
An Eel with a snake-like body is an Anguilla. Its other name is Fresh Water Eel. Those who feed on the mosquito larvae are GambusiaAffinis or Mosquito fish. And, Murrelsare Snake headed fishes because they have a head that looks like a snake.
17.)
Solution: c) Pterophyllum is dog fish
Pterophyllum is angel fish whereas scoliodon is a dogfish so option c is the incorrect one.
18.)
Solution: c) Flying fish
Flying fish is marine whereas Labeo and Katla are freshwater fishes.