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Class Chondrichthyes

In Torpedo or...

Question

In Torpedo or electric ray, the electric organs are modified

A

Nerve nets

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B

Cartilage complexes

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C

Branchial muscles

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D

Respiratory centres

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Solution

The correct option is C Branchial muscles
A. Nerve net is a system of interconnected neurons or simply, it may be defined as nervous system.
B. Cartilage complexes is arrangement of cartilage which is a kind of structural component in the body.
C. Branchial muscles are derived from the pharyngeal arches
D. Respiratory systems are a part of brainstem and located in medulla oblangata.
Torpedo, known as electric ray, is a bottom living marine fish famous for discharging electricity. The electric organs are modified branchial muscles.
So, the correct answer is 'Branchial muscles'.

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Q. In Torpedo (electric ray), electric organs are present as modified musculature between.

Q. Which of the following statement(s) is/are false?
(A) In Torpedo, the electric organs are capable of generating electric solid shock
(B) In amphibian, the skin is moist and they have thick scales
(C) Birds are poikilothermous animals
(D) All protochordate are marine
(E) Amphioxus has a specialized heart

Q. Which of the following statements are true or false?
(1) In Torpedo the electric organs are capable of generating strong electric shock to paralyze the prey.
(2) Bony fish use pectoral, pelvic, dorsal, anal and caudal fins in swimming.
(3) Amphibians skin is moist with thick scales.
(4) Birds are poikilotherms.
(5) A unique mammalian characteristic is the presence of milk-producing mammary glands by which the young ones are nourished.

γ

-rays are not affected in magnetic or electric field.

Q. Which of the following statement are true/ false
In Torpedo the electric organs are capable of
generating strong electric shock to paralyze the prey
Bony fishes use pectoral, pelvic, dorsal, anal and
caudal fishes in swimming
Amphibian skin is moist and has thick scales
Birds are poikilothermous animals
The most unique mammalian characteristic is the
presence of milk producing mammary glands by which
the young ones are nourished.

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