did you know....

all living things are made up of cells
plant cells contain cell walls that give the plant shape and support
all living things carry out six life proceses: nutrition, respiration, excretion, growth, response, and reproduction
a single-celled organism grows by increasing in size, multi-celled organisms increase the number of cells
the basic needs of living things are energy, water, gases, and temperature
all cells come from other cells
25 million cells divide every second in humans
the first electron microscope was invented in 1930