the process in which cells develop in different ways to perform different tasks.
process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated.
movement of specific molecules across cell membranes through protein channels.
energy-requiring process that moves material across a cell membrain against a concentration difference.
process in which extensions of cytoplas surround and engulf large particles and take them into the cell.
specialized structure that performs important cellular functions within a eukaryotic cell.
granular material visible within the nucleus; consists of DNA tightly coiled around proteins.
thread like structure within the nucleus containing the genetic information that is passed from one generation of cells to the next.
internal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modified.
stack of membrains in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum.
cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use.
organelle found in cells of plants and some other organisms that captures energy from sunlight and converts it into chemical energy.
network of protein filaments withing some cells that helps the cell maintain its shape and is involved in many forms of cell movement.
one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope.
collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life.
idea that all living things are composed of cells, cells are the basic unites of structure and function in living things, and new cells are produced from existing cells.
the center of the atom which contains the protons and neutrons; in cells, strucure that contains the cell's genetic material (DNA) and controls the cell's activities.