What experimental evidence leads scientists to believe that only quantized electronic energy states exist in atoms?

The experimental evidence that leads scientists to believe that only quantized electronic energy states exist in atoms was the Niels Bohr experiment on Hydrogen gas. The quantized model for electron orbits in atoms that effectively explained the spectroscopic behavior of the atoms. Each line in the spectrum corresponds to one exact frequency of light emitted by the atom.

C. a mature ovule of a plant.

Plants take energy from the sunlight with the of chlorophyll so the plant starts the food chain. then an herbivore eats the plant and gets its energy.then a carnivore or a human eats the herbivore and gets its energy. : )