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If many different species live in an ecosystem, this the ecosystem to fill its a. populations b. niches c. producers d. communities
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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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How secretion and excretion both are different? explain in simple language.
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Acertain plant requires moisture, oxygen, carbon dioxide, light, and minerals in order to survive. t...
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