(D) In vertebrates,the number of cranial nerves varies across different classes. $12$ pairs of cranial nerves are a characteristic feature of amniotes

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(D) In vertebrates,the number of cranial nerves varies across different classes. $12$ pairs of cranial nerves are a characteristic feature of amniotes,which include Reptiles,Birds,and Mammals. Therefore,all the groups mentioned in the options possess $12$ pairs of cranial nerves.

Class 11 Biology Animal Kingdom Mix Examples - Animal Kingdom

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$12$ pairs of cranial nerves are present in

AIIMS 1993 All AIIMS

A
Reptilia
B
Birds only
C
Mammals only
D
All the above

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Fill in the blank spaces appropriately in the table below:

Phylum/Class Excretory organ Circulatory system Respiratory organ

Arthropoda $...............$ $...............$ Lungs/Gills/Tracheal system

$...............$ Nephridia Closed Skin/Parapodia

$...............$ Metanephridia Open $...............$

Amphibia $...............$ Closed Lung

Phylum/Class	Excretory organ	Circulatory system	Respiratory organ
Arthropoda	$...............$	$...............$	Lungs/Gills/Tracheal system
$...............$	Nephridia	Closed	Skin/Parapodia
$...............$	Metanephridia	Open	$...............$
Amphibia	$...............$	Closed	Lung