Describe the following plant growth regulators:
$(1)$ Gibberellins
$(2)$ Cytokinins

(N/A) $(1)$ Gibberellins: These are acidic plant growth regulators that promote stem elongation,seed germination,and flowering. They are responsible for breaking seed dormancy and are widely used in the brewing industry to speed up the malting process.
$(2)$ Cytokinins: These are plant hormones that promote cell division (cytokinesis). They are primarily synthesized in regions where rapid cell division occurs,such as root apices and developing shoot buds. They help in producing new leaves,lateral shoot growth,and adventitious shoot formation. They also help delay leaf senescence.