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.
The European red squirrel lives in the European Deciduous Forest. The red squirrel prefers to live in the forest but in some places they live in gardens and parks. The European Deciduous Forest has 4 seasons.It is cold in the winter and very warm in the summer.It spreads from northern Portugal to southern Norway. Eastern Europe is dry.he red squirrel prefers to live in the forest but in some places they live in gardens and parks. The. European Deciduous Forest has 4 seasons. It is cold in the winter and very warm in the summer.