What evidence can you find to describe whether the lungs are active

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Which feature of a human community is similar to a niche in a biological community

Which process moves molecules and has these traits? -moves from high concentration to low concentration -moves from uneven distribution to even distribution -can occur when there is no membrane o o active transport in a cell diffusion osmosis o passive transport in a cell