A farmer designs a corn plant that produces multicolored kernels by crossing a plant that has yellow kernels with a plant that has red kernels? Which of these describes the process the farmer uses? А. Natural selection B. Selective breeding C. Genetic engineering D. Asexual reproduction

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?