Biology / Unit 1 Bio 0041 short lesson, about 20 seconds
Order
Captions available
The idea
Order is the property of life in which organisms are built from a highly organized structure, from atoms up through cells and tissues.
In practice
A single-celled bacterium still arranges its molecules into ordered structures, no less than a multicellular frog does.
Where people slip
Order describes the organism's structure, not its behavior — a resting organism is no less ordered than an active one.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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