Due to selective breeding, there are animals with far more favorable traits. Selective breeding or better known as artificial selection is the act of breeding for either aesthetic reasons or means to survive. If I were to breed a dog I would breed it with another animal with favorable traits such as floppy ear or beautiful brown fur.
The active transport and the facilitated diffusion both involve the proteins present in the cell membrane. Facilitated diffusion transport the large and the charged molecules through the protein transport channels present in the cell membrane
