The study of the form and internal structures of plants.

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Why are trichomes important for both the roots and shoots of plants?

In what ways are trichomes vital to the plant? Why have them on the plant shoots as well?
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Why do conker flowers grow upwards?

Most trees I know that have their flowers in groups hang these groups down. I noticed, however, that conker flowers grow upwards! I guess that growing against gravity requires special effort, so ...
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Root hair formation in Arabidopsis

In arabidopsis, 2 cell types arise in the root epidermis : root hair cells and hairless epidermal cells. The immature epidermal cells that are in contact with 2 underlying cells of root cortex ...