State one specific way the removal of trees from an area has had a negative impact on the environment.

If trees are removed from an area, the environment is negatively effected. Trees are the lungs of this planet because it produces a lot of oxygen and absorbs carbondioxide gas from the environment. One tree produces a lot of oxygen that is enough for 40 peoples. It also provides habitat for millions of species. If trees are removed these species dies and pollution of the environment also increased.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

a = executive branch; b = judicial branch