In botany, what is the decay-resistant outer coating of a pollen grain or spore called?
Pollen Extine Pollens Monosulcate Pollen grain Colpus Pollen grains Microsporogenesis Porate pollen Exine
pollen grain pollen extine microsporogenesis monosulcate colpus pollens pollen grains porate pollen exine
exine
WikipediaEntity
Exine