(A) $Ginkgo$ is a genus of gymnosperms. In gymnosperms,the male gametes are typically non-motile,except in primitive groups like Cycadales and Ginkgoa

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(A) $Ginkgo$ is a genus of gymnosperms. In gymnosperms,the male gametes are typically non-motile,except in primitive groups like Cycadales and Ginkgoales,where the male gametes are flagellated and motile. Therefore,in $Ginkgo$,the male gametes are motile.