Homozygous is the same heterozygous is different. Such as TT and tt are homo and Tt is heterozygous.
Answer:
Beavers and their dams play an important role in nature. Because of the dramatic effects their dams have on surrounding ecosystems, these mammals are considered a keystone species. By constructing dams they create wetlands -- lush environments which attract fish, ducks, frogs and other creatures.
Explanation:
Can you explain more?? please. /////:/
