B is the correct answer. They can sometimes show an extinction but not always.
D, active transport because that protein uses atp to cross channels and active transportation is the only form of movement that’s used atp to move
It is an essential element for plant life, but when there is too much of it in water, it can speed up eutrophication (a reduction in dissolved oxygen in water bodies caused by an increase of mineral and organic nutrients) of rivers and lakes. Soil erosion is a major contributor of phosphorus to streams.
True...........................
Uracil pairs with adenine in RNA base
