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The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.
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In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?
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Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?
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