Answer:
There are two types of cell membranes. Either open or closed. Open is when other particles can get in or out. Closed is the opposite.
I hope that helps!
Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
coffee beans is a seed of coffea plant and source for coffee
