How fertilization occurs in cycads and Ginkgo?

Explanation

InN/AtheN/AcycadsN/AandN/AGinkgo,N/AfertilizationN/AisN/AtransitionalN/AbetweenN/AtheN/AconditionN/AfoundN/AinN/AfernsN/AandN/AotherN/AseedlessN/Aplants,N/AinN/AwhichN/Afree-swimmingN/AspermN/Aoccur,N/AandN/AtheN/AconditionN/AfoundN/AinN/AotherN/AseedN/Aplants,N/AwhichN/AhaveN/AnonmotileN/Asperm.N/ATheN/AmicrogametophytesN/AofN/AcycadsN/AandN/AGinkgoN/AproduceN/AaN/ApollenN/Atube,N/AbutN/AthisN/AdoesN/AnotN/ApenetrateN/AtheN/Aarchegonium.N/AInstead,N/AitN/AisN/AhaustorialN/AandN/AmayN/AgrowN/AforN/AseveralN/AmonthsN/AinN/AtheN/AtissueN/AofN/AtheN/Anucellus,N/AwhereN/AitN/AabsorbsN/Anutrients.N/AEventually,N/AtheN/ApollenN/AgrainN/AburstsN/AinN/AtheN/AvicinityN/AofN/AtheN/Aarchegonium,N/AreleasingN/AmultiN/Aflagellated,N/AswimmingN/AspermN/Acells.N/ATheN/AspermN/AthenN/AswimN/AtoN/AanN/Aarchegonium,N/AandN/AoneN/AofN/AthemN/AfertilizesN/AtheN/Aegg.