Mammals metabolize ammonia into a molecule called urea: As you can see, this molecule contains two atoms of nitrogen. Although it requires metabolic energy to build, it also is less toxic than ammonia, and it requires less water to flush from the system.Your urine's main nitrogenous waste product is urea.ammals metabolize ammonia into a molecule called urea: As you can see, this molecule contains two atoms of nitrogen. Although it requires metabolic energy to build, it also is less toxic than ammonia, and it requires less water to flush from the system.
Tree squirrels are squirrels that live in trees and ground squirrels, like chipmunks and prairie dogs, are squirrels that live in the ground. As a general rule, tree squirrels have longer life spans than ground squirrels.1.
Eastern grey squirrels typically lives in all of the Eastern United States and parts of Canada, whereas the Western grey squirrel is found mainly along the Western Coast of the United States and Canada. Chipmunks live in many parts of the United States. Prairie dogs live mainly in the central United States as well as Canada and parts of Mexico. Eastern Fox squirrels live along the Eastern United States and parts of North East Mexico