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Gall


Three pineapple galls developing on Norway Spruce caused by aphids.
Three pineapple galls developing on
Norway Spruce caused by aphids.


A Gall is a tumor-like growth in a plant that is induced by an animal, usually an insect, or some other organism.



By triggering the formation of galls, animals provide themselves with a safe place to hide and a convenient source of food.

 


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