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Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
Movement of a bolus of food from the mouth to the esophagus. The bolus then travels to the stomach.
Measles. A photograph of a child stricken with measles, showing the tell-tale sign of the skin rash.
Coordination of antagonist muscles to perform movement.
Measuring a child’s height with a measuring stick
Flagellar movement