Aside of the amusing reference popularized by Frank Zappa, what is the usual cause of a large-scale 'yellow snow' weather effect seen in certain parts of the world?
Pollen Extine Pollens Monosulcate Pollen grain Colpus Pollen grains Microsporogenesis Porate pollen Exine
microsporogenesis pollen pollen grain pollen grains exine extine pollens porate pollen monosulcate colpus
pollen
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Pollen