Sir Francis "Frank" Darwin, F.R.S. (1848 -1925), a son of the British naturalist Charles Darwin, followed his father into botany. From Darwin and the Beagle by Alan Moorhead.. Francis Darwin worked with his father on experiments dealing with plant movement, specifically phototropism and they co-authored The Power of Movement in Plants (1880). Their experiments showed that the coleoptile of a young grass seedling directs its growth toward the light by comparing the responses of seedlings with covered and uncovered coleoptiles. These observations would later lead to the discovery of auxin.

Sir Francis "Frank" Darwin, F.R.S. (1848 -1925), a son of the British naturalist Charles Darwin, followed his father into botany. From Darwin and the Beagle by Alan Moorhead.. Francis Darwin worked with his father on experiments dealing with plant movement, specifically phototropism and they co-authored The Power of Movement in Plants (1880). Their experiments showed that the coleoptile of a young grass seedling directs its growth toward the light by comparing the responses of seedlings with covered and uncovered coleoptiles. These observations would later lead to the discovery of auxin.

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