I'd like you to help to solve the exercise of text. Would it be possible to explain on it?

(Exercise) Scientists have isolated genes that cause particular diseases and modified genes that alter organisms for particular reasons (for example, to help beneficial plants and animals to survive under harsh conditions). Make an argument as to why businesses that develop modified organisms should be able to preserve their property rights by patenting such organisms. Then, make a counterargument as to why such organisms should not be patentable.