Luciferase is a protein (enzyme) that is produced by fireflies and catalyzes a reaction allowing them to “glow” at night.
why might it be useful to scientists to learn the genetic code for the production of luciferase?

Luciferases are widely used as reporter gene in the study of promoter sequences of genes, they are also at the origin of the method of ATPmetry. as well as in pyrosequencing: ATP sulfurylase then converts this pyrophosphate (PPi) to ATP which is then used, coupled to a luciferin, by a luciferase. Oxyluciferin and a light signal are then produced.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.