Mention one application for each of the following :
(a) Passive immunization
(b) Antihistamine
(c ) Colostrum
(d) Cytokinin - barrier

Explanation

(a) Passive immunization : Even in ceses of snakebites , the injection which is given to the patients contain preformed antibodies against the snake venom . We need to directly inject the preformed antibodies or antitoxin (a preparation containing antibodies to the toxin).
(b) Antithistamine : Pharmaceutical drug that opposes the activity of histamine reception in the body.
(c ) Colostrum : The yellowish fluid colostrum secreted by mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant.
(d) Cytokinin - barrier : Virus infected cells secrete proteins called interferons which protect non - infected cells from further viral indection.