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Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?
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Biology, 22.06.2019 20:00
Are humans interfering with or a part of evolution happening today? find examples of evolution seen in recent history that could be caused by human activity.
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What is the specific name of carbohydrase enzymes i...
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