(i) Write the scientific names of the two species of filarial worms causing filariasis.
(ii) How do they affect the body of infected person(s).
(iii) How does the disease spread ?

(i) Write the scientific names of the two species of filarial worms causing filariasis. (ii) How do they affect the body of infected persons(s)? (iii) How does the disease spread?

Name the plant source of the drug popularly called "smack". How does it affect the body of the abuser?

Name an opium drug and its source plant. How does the drug affect the human body?

State the effects of a force applied on (i) a non rigid, and (ii) a rigid body. How does the effect of the force differ in the two cases ?

Name an opioid drug and its source plant. How does the drug affect the human body?

The diagram below shows two parallel rays A and B of red and violet light respectively incident from air on air-glass boundary. Complete the diagram showing the refracted rays for them in the glass. (i) How do the speeds of the rays differ in glass ? (ii) are the two refracted rays in glass parallel ? Give a reason for your answer. (iii) How does the refractive index of glass differ for the two rays ?

Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.

Name one plant and the addictive drug extracted from its latex. How does this drug affect the human body?

A reaction is first order in A secod order in B : (i) write differential rate equation. (ii) How is the rate affected when the concentration of B is tripled ? (iii) How is the rate affected when the concentration of both A and B is doubled?

(i) How and at what stage does Plasmodium enter into a human body ? (ii) With the help of a flow-chart only show the stages of asexual reproduction in the life-cycle of the parasite in the infected human. (iii) Why does the victim show symptoms of high fever ?