Drugs that cause malformations in embryo during pregnancy are called
Tranquilizer
Teratogens
Alcoholic beverages
Nicotine
The tranquillisers differ from the sedatives that they
Except skin, other physical barriers which also helps to prevent the entry of the microorganisms are
$I.$ mucus coating of the epithelium lining the respiratory
$II.$ gastrointestinal tracts
$III.$ urogenital tracts
Choose the correct option
Morphine is extracted from
Which of the following fish is introduced in pond to control or eliminate the vector responsible for the transmission of malaria and filariasis?