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Biology, 31.07.2019 11:30 rio1228p7c7vj
What categories of food do the world's three foodsystems produce?
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Biology, 21.06.2019 15:40
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Biology, 22.06.2019 10:00
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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