Why do fruits change colour as they ripen?

BBC Earth (Asia) - - Science -

Un­ripe fruits are green be­cause of chloro­phyll in their cells. As they ripen, the chloro­phyll breaks down and is re­placed by or­ange carotenoids and red an­tho­cyanins. Th­ese com­pounds are an­tiox­i­dants that pre­vent the fruit from spoil­ing too quickly in the air. Fruit-eat­ing an­i­mals have also evolved to use the colour change as a sign of ripeness and this helps the plant too, since they need an­i­mals to eat the fruit to dis­trib­ute their seeds. LV

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