The document discusses retroviruses, which are enveloped viruses that contain an RNA genome and the enzyme DNA polymerase. Retroviruses can be transmitted sexually or through blood and cause diseases like AIDS. Examples given are HIV and sarcoma viruses. Prevention methods include safe sex practices, blood screening for HIV, and avoiding sharing needles.

2. Anam Ajmal
Rudaba Nisar

4.  They contain double stranded ,negative sense
,linear but non segmented RNA.
 They are Icosa hedral or sometime conical in
shape.
 They are enveloped viruses.
 Contain DNA polymerase enzyme.

5.  Its examples are:
 HIV virus
 Sarcoma virus

7.  HIV virus causes the disease AIDS
 Which is a STD (sexually transmitted disease)
disease

9.  Sexual contacts
 Blood transfusion
 Contaminated needles

10.  Safe sex
 HIV test before blood transfusion