The functional unit of mutation is

$II.$ Agrobacteriumtumefaciens delivers a piece of $DNA$ known as $'Z-DNA'$ in the Tiplasmid which transforms normal plant cells into tumour cells to produce chemical against pathogens

$III.$ Retrovirus, adenovirus, papillomavirus are also now used as cloning vectors in animal because of their ability to transform normal cells into cancerous cell.

$IV.$ In genetic engineering, $DNA$ from different sources are cut with the same restriction enzymes so that both $DNA$ fragments have same kind of sticky ends

Choose the correct option

→

Homologous organs show.

→

World wild life week is:

→

In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from preexisting non-living organic molecules. The primitive earth conditions created include:

→

Use of Intra Uterine Devices $(IUDs)$ is one of the most widely accepted methods of contraception in India; because

→

Separate the following into homologous and analogous organs

$I.$ Sweet potato