Differentiate between: (i) PCR and Gene Cloning. (ii) Batch Culture and Continuous Culture.

(i) PCR vs. Gene Cloning:
PCR (Polymerase Chain Reaction): Amplifies specific DNA sequences in vitro.
Gene Cloning: Involves inserting a DNA fragment into a vector and replicating it in host cells.
(ii) Batch Culture vs. Continuous Culture:
Batch Culture: Microorganisms are grown in a closed system with a single batch of medium, where growth occurs in phases.
Continuous Culture: Microorganisms are grown in an open system with constant addition of fresh medium and removal of spent medium, allowing for continuous growth.