The basic unit of structure and function in living things.
a thin,flexible barrier that surrounds a cell and controls which substances pass into and out of a cell.
a rigid supporting layer that surrounds the cells of plants and some other organisms.
a tiny cell structure that carries out a specific function within the cell.
similar cells and cell products forming a definite kind of m material with a specific function.
grouping of tissues into a distinct structure.
having or consisting of a single cell.
made of a single cell.
an organism that is able to capture energy from sunlight or chemicals and use it to produce its own food.
an organism that cannot make its own food and gets food by consuming other living things.
cellular organism that has no nuclear membrane.
and organism whose cells contain a nucleus.