Which among the following is an autoimmune disease?
$Rheumatoid$ $arthritis$
$AIDS$
$Hepatitis-B$
$Swine flue$
Rheumatoid Arthritis $(RA)$ is a form of inflammatory arthritis and an autoimmune disease
$A$ – Acid in the stomach and saliva in the mouthare examples of physiological barrier.
$R$ – Tears from eyes is example of physicalbarrier.
Malaria is caused by
Select the correct statement from the ones given below.
Secondary metabolites such as nicotine, strychnine and caffelne are produced by plants for their :
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