Retroviruses have an enzyme, called reverse transcriptase, that gives them the unique property of transcribing their RNA into DNA after entering a cell. The retroviral DNA can then integrate into the chromosomal DNA of the host cell, to be expressed there. HIV is a retrovirus.
Here HIV is retrovirus...
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9) green revolution. हरित क्रांति
11) human immuno deficiency virus
12) 19th century
15) all the above
16 both A and B
17) Both 1 and 2
18) increase air pollution
20)in generating electricity
both biotic and abiotic components
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Is a retro virus
a. human immuno deficiency virus