(a) What is AIDS?
(b) Mention any four possible routes by which transmission of HIV occurs
(c) Name any two immune cells that are susceptible to HIV attack
(d) Name the widely used diagnostic test for AIDS.

a) Mention the pathogen and any two symptoms of typhoid. b) Name the diagnostic test used to confirm typhoid.

What are single cell protein? Mention their significance. b) Name any two organisms that are used as single cell protein.

(i) What does this diagrammatic sketch depict? (ii) Identify a' and 'b (iii) Name the widely used diagnostic test when a person gets this disease.

What kind of energy transformation takes place in an electric motor ? Name any two devices which use electric motor as an essential component of their working .

Name the technique which is used to detect HIV in suspected AIDS patient?

Name the technique which is used to detect HIV in suspected AIDS patient?

X is a human being with the reproductive oval shaped almond sized organ Y which releases mature gamete Z monthly once that goes into tube like structure A where it fuses with another gamete called B to form a new cell C. This cell C divides vigorously to form a ball of cells D which gets embedded in the thick lining of organ E of the reproductive system of X where it grows and develops into a foetus. i] Identify X, as male or female. ii] Name the reproductive part Y and give its two functions. iii] Name the gametes Z and B. Iv] Name the process which leads to the formation of C and Identify C. v] Name the ball of cells D. vi] Identify the organ E.