There are many different kinds of membranes in a cell. Learn how they subdivide sections of a cell and how proteins in these membranes are gatekeepers for what goes in and what comes out.

Free lesson plans aligned to NGSS, student activity sheets, and integrated animations help students understand science and chemistry in everyday life. Inquiry in Action is a FREE teacher resource of ...

Plant cells have some specialized properties that make them distinct from animal cells. Learn how special structures, such as chloroplasts and cell walls, create this distinction.