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Tap on and choose 'Add to Home Screen' to create a shortcut app

Tap on and choose 'Add to Home Screen/Install App' to create a shortcut app

signaling pathway

This refers to control over a chain of metabolic events within the body. A “signal” from outside or inside a cell is passed along step-by-step until it changes how certain genes are turned on or off, resulting in an alteration of a condition within the body.