How to make working model on kidney function ?????

 when do person need repeated blood transfusion??

 sir please give life cycle of malaria???

What is the difference between antigens and antibodies?

I've selected my biology investigatory project as " Drug Abuse Alcoholism" can i get some ideas how to start with it or what type of content should it carry ?

what is meant by bolus,chyme and chyle.?

 what is mutation??plz explain

 what is the full form of AMIS & CMIS?? 

What is Drug abuse?

Q1. How is snow blindness caused in human?

 What is meant by H2L2 for antibody?

a powerful eye irritant present in smog is??????????????

a. nitric oxide

b. suphur dioxide

c. peoxyacetyl nitrate

d. carbon dioxide

derive internal structure of human brain?

write the names of any two vestigial organs found in man..