In which group of plants is pollination exclusively carried out by wind?

In gymnosperms,the sporophytic phase is represented by which of the following?

With respect to the life cycle of $Pinus$,considering the formation of the female cone in the summer of year $0$,when does fertilization occur?

Gymnosperms originated in

The part of the ovule in $Pinus$ which contains megaspore mother cells that divide to form haploid megaspores is:

Pinus seed is originated in