<span>The Excretory System</span>
Well, if you take two purebred chickens,and bread them with with each other, the offspring is no longer going to be purebred, so the feathers they have will be a mix of the purebreds.
Birds have hollow bones due to the fact thay need to be as light as possible for their wings to generate enough lift for them to fly
The responsibilities of a scientists is ti discover new possibilities of the future and our world.<span />
