Diffusion of water across a selectively permeable membrane

Cells transporting materials across the cell membrane; uses energy

The idea that all organisms are composed of one or more cells

Rigid structure outside of the plasma membrane- provides support and protection. Only found in plant cells

Chlorophyll-lined organelles that capture light energy and transform it into chemical energy

A difference in the concentration of a substance from one point to another.

Clear, gelatinous fluid in cells; suspends eukaryotes' organelles

Particles moving from areas of high concentration to areas of low concentration

Result of diffusion, continuous movement of particles, but there is no change in concentration

A cell that has a nucleus and membrane-bound organelles

Transport of molecules across plasma membrane by transport proteins, helps diffuse materials across a cell

Positively charged center of an atom; manages cellular function and holds DNA in eukaryotes

Movements of particles across cell membranes, cell uses no energy to transport materials

Cells that make up plants; contains cell wall

Flexible boundary between cell and its environment, allows materials to come and go

Unicellular organisms without a nucleus

Non-membrane bound organelles, assembles proteins

Maintains homeostasis within a cell, allows molecules in and out

Membrane-bound space in cytoplasm used to store materials