Common characteristics found in chondrichthyes and osteichthyes
a. Streamlined body
b. Four pairs of gills
c. Two-chambered heart
d. Poikilothermous (cold-blooded)
c. Dioecious (sexes are separate)
f. Internal fertilisation

Five

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Four

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Six

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Three

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Solution

The correct option is B Four
Common characteristics shared by Chondrichthyes and Osteichthyes

Cartilaginous fishes and bony fishes share four common characteristics like streamlined body, two-chambered heart, poikilothermy and are dioecious.

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How many common characteristics are found in Chondrichthyes and Osteichthyes?

Observe the given set of characteristics and identify the class of vertebrata they belong to:

i. Streamlined body

ii. Cold blooded

iii. Two chambered heart

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