The microsporophyll of Cycas represents a

The foliage leaves or needles in $Pinus$ are borne by

In $Gymnosperms$,the mode of pollination is ........

The pollination in $Pinus$ is

Top-shaped multiciliate male gametes,and the mature seed which bears only one embryo with two cotyledons,are characteristic features of

Plants in which seeds are produced on megasporophylls and are not enclosed by fruits are included in ........