Lignified

... body . The tracheids, vessel elements, and sieve-cells are all lines with pits and have perforations and open discs for transport. Xylem does have lignified cell walls, but they're covered in the pits for diffusion. 2) You have it pretty spot-on with tracheids. They're long vascular cells that ...

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1. Is the wall of the xylem lignified and completely impermeable to water? If so how come the pressure flow theory (which deals with translocation of materials in phloem) states that when the photosynthetic source is loaded with sugar, ...

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... contact with each other. 2.What are sieve tubes? 3.what is the main carbohydrate translocated in the sieve tubes of a flowering plant 4.what is a lignified wall and how does it prevent xylem vessels from collapsing-or maybe it doesn't-help :shock: 5. Does a mammalian heart pump equal volumes of ...

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... one is a sweet one ( Amygdalus communis var. sativa ). Their fruit primordia are harvested and eaten whole, including the stone which is not lignified yet. In autumn rape fruits (drupes) are harvested and their seeds are chiped off and being sold on the bazaars or exported. We know them as ...

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