A. glucose is the building block
Black hair because a phenotype is physical characteristics of an organism.
As the wolf population increases, the need for food will increase, causing the wolves to hunt more hares, making the hare population decrease.
The esophagus has a simple but significant functions to animals who has it. These functions can be a) to swallow food and serve as a passageway to the stomach and b) may serve to release the eaten food that might have some harmful compositions or chemicals -the vomit response.
