$A$ - Acid in the stomach and saliva in the mouthare examples of physiological barrier.
$R$ - Tears from eyes is example of physicalbarrier.
$A$ and $R$ both are correct.
$A$ and $R$ both are incorrect.
$A$ is incorrect, $R$ is correct.
$A$ is correct, $R$ is incorrect.
Which of the following diseases is endemic
Diseases like dysentery, cholera, typhoid etc., are more common in over crowded human settlements. Why ?
One good example of an ’antiseptic' is
Psychoanalysis was founded by
Fertilization and development of plasmodium occurs in