Why is a device that 'slows down the sinking speed' useful to wind-dispersed fruits
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Many seeds which have a small mass, such as the willow herb, develop long hairs. The hairs increase the air resistance of the seed and allow it to be blown away. The dandelion has a fruit that forms a tuft of hairs. It acts as a parachute and slows down the fruit's sinking speed as the wind blows it along.
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