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Graphs showing sigmoid growth curves. (a) Growth in height (cm) of a sunflower stem. (b) Growth of an entire corn plant as measured by an increase in dry weight (grams). (Copyright © McGraw-Hill Education)

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from article Plant growth

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from article Plant growth

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from article Plant growth

The apex of a tomato plant showing the localization of PIN proteins as detected by fluorescence microscopy (arrows). Via the presence of the PIN proteins, auxin accumulates at the locations where leaf branching is occurring or about to occur in the…

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from article Plant growth

The regulation of flower initiation by photoperiod in the long-day plant, Arabidopsis. Under long days, CO (Constans) protein formation in the leaves induces the biosynthesis of FT (Flowering locus T) protein, which constitutes the floral signal,…

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from article Sisal

Sisal (Agave sisalana). (Photo courtesy of Peter Lapshin)

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from article Sundew

Spoonleaf sundew (Drosera intermedia). (Photo by Robert H. Mohlenbrock, U.S. Department of Agriculture–Natural Resources Conservation Service PLANTS Database)

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from article Wool