If a child of $10$ years has the intelligence of a $14$ years old child,the $I.Q.$ of this child would be:

Which system is affected by neurotoxic substances?

The ability to perceive a stimulus and enter a state of activity is a property of a nerve fiber. It is called:

Which of the following is absent in plants?

Proprioceptors are those,which give the sense of

Which of the following systems are involved in the regulation and coordination of the human body?
$I -$ Digestive system
$II -$ Endocrine system
$III -$ Excretory system
$IV -$ Nervous system
$V -$ Reproductive system