The following table shows certain diseases, their causative organisms and symptoms. Fill the gaps.

In the given flow diagram, the replication of retrovirus in a host is shown. Observe and answer the following questions.

a. Fill in (1) and (2)

b. Why is the virus called retrovirus?

c. Can the infected cell survive while viruses are being replicated and released?

“Maintenance of personal and public hygiene is necessary for prevention and control of many infectious diseases”. Justify the statement giving suitable examples.

The outline structure of a drug is given below.

a. Which group of drugs does this represent?

b. What are the modes of consumption of these drugs?

c. Name the organ of the body which is affected by consumption of these drugs.

Give the full form of CT and MRI. How are they different from each other? Where are they used?