Poop. I don't really know what you are asking but the excretory system removes the stuff from our stomach that we cant use or stuff that already has all of the nutrients that we need removed. Hope this helps
OK the the answer you are looking for will be the excretory system because that is the system that releases waste.
Bones consist of living cells embedded in a mineralized organic matrix. This matrix consists of organic components, mainly type I collagen – "organic" referring to materials produced as a result of the human body – and inorganic components, primarily hydroxyapatite and other salts of calcium and phosphate.
The answer is ecological
niche. A species carving of its ecological niche is dependent on the distribution of
resources in the environment and its competitors. It begins with behavioral adaptations. A species niche includes its nutrition, relationship with other species in the ecosystem, and habitat. There
are two types of niches; realized niche (niche acquired when there is competition)
and fundamental niche (niche acquired even without competition).
It helped him because you can breed certain traits you want in things to get the traits you want
