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Key terms: pollen plants cells flower wall pollen grain bee species palynology outer male quantity anemophilous variety nucleus produce grow flowering plant polen conditions seed plants pollen tube anther composed generative pollination fossil record pollen allergies carpel protects cone outer wall layers except ragweed amount of pollen furrows arizona hay fever wall called ratio carried reproductive forensic dependence pores resistant Search external links cited by footnotes on Wikipedia page Pollen: |
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