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- Sieve tubes and sieve elements are a. homoplastic because they have different function. b. homologous because they have similar function. c. homoplastic because their common ancestor was single-celled. d. structures involved in transport within animalsWhat are stromatolites? From what we know of their formation today, why might we expect them to have been present early in Earth’s history?Can you answer all the parts of this question about this picture A:This organism is a member of what genus? B: What is Structure E, K, A, B, and J
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