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Biology 8 Online
OpenStudy (anonymous):

How do acacia trees communicate with each other in response to insect attack? They release pollen. They drop their leaves. They produce thorns and spines. They produce a gas called ethylene.

OpenStudy (dqswag):

They produce a gas called ethylene.

OpenStudy (dqswag):

xD

OpenStudy (dqswag):

They produce a gas called ethylene.

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