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Biology 18 Online
OpenStudy (tanya123):

Define hormone.

OpenStudy (abb0t):

@tanya123 http://bit.ly/1mYLJAA

OpenStudy (shreehari499):

It is a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.

OpenStudy (abb0t):

The link I provided explains all in full detail at ALL grade levels.

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