Which one of the following is used as a vector for cloning genes into higher organisms?

The correct option is A

Retrovirus

The correct option is A.

Explanation of the correct option:

1. Gene therapy, which is the act of introducing DNA into living humans in order to treat disease, uses retroviral vectors to replace the retroviral gag, pol, and env genes with therapeutic genes.
2. It is utilized to replace a gene product that is absent or to correct mutant alleles.

Explanation of the incorrect options:

Option B:

The baculovirus articulation vector framework (BEVS) stage has turned into a laid-out assembling stage for the development of viral immunizations and quality treatment vectors.

Option C:

1. Salmonella typhi (S. Typhi) are tiny organisms that can infect the digestive tract and bloodstream.
2. Typhoid fever is the name given to the illness.
3. S. Paratyphi microbes cause a comparative, yet milder sickness, which goes under a similar title.

Option D:

1. Rhizopus nigricans is an overall dispersed animal category. It is tracked down on a wide range of rotten materials.
2. It is many times quite possibly the earliest form to show up on flatbread.

Final Answer: Retrovirus is used as a vector for cloning genes into higher organisms.