Don't pollute the Earth.
Don't need gas.
Liver cells because it uses the most energy than the other choices
The answer is: Abscisic acid.
Answer:
Recombinant plasmid
Explanation:
Researchers can insert DNA fragments or genes into a plasmid vector, creating a so-called recombinant plasmid.
This plasmid can be introduced into a bacterium by way of the process called transformation.