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