The diaphragm is absent in which of the following?

  • A
    Rabbit
  • B
    Human
  • C
    Bat
  • D
    Frog

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Given below are four matchings of an animal and its kind of respiratory organ:
$1.$ Silver fish - trachea
$2.$ Scorpion - book lung
$3.$ Sea squirt - pharyngeal gills
$4.$ Dolphin - skin
Choose the correct option.

Assertion : Blood is coloured in the insects.
Reason : Insect blood has no role in $O_2$ transport.

The respiratory organs vary in different animals due to their

What is the unique feature of the respiratory system of birds?

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