Answer:
Active transport: movement against a gradient To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the proper concentrations of ions and molecules in living cells.
The virus becoms infection, and they create an epidemic that will last for a long time. This was the case back in the early days.
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When you observe and compare specific physical traits of different birds you will learn that some birds have characteristics that help them live and survive in their own habitat that other birds may not have but make up those birds have characteristics that help them in their own habitat.
The animals would lose their homes and might die because they have no shelter. The plants that are in the exact spot where the house is going to be will die. Overall I think the animal species that lives there would decrease rapidly, which would reduce the biodiversity in the area.
