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Ten pairs of spiracles with trachea are ...

Ten pairs of spiracles with trachea are present in

A

Star fish

B

Cockroach

C

Earthworm

D

Frog

Text Solution

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The correct Answer is:
B
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Read the following statements (i) the point of bifurcation of trachea is called carina and is at the level of 5th thoracic vertebra (ii)the right bronchus is shorter wider and more in line with trachea than the let bronchus (iii) the bronchioles are without cartilaginous rings (iv) the surfactant of lungs is secreted in infants between 6th and 7th month of life which of these are correct ?