Seed-bearing plants differ from all other plants in a. they have only xylem and no phloem.. b. they have a gametophyte generation.. c. their gametes do not require water for fertilization to occur.. d. they have true roots, stems, and leaves..

The answer is c. their gametes do not require water for fertilization to occur.

Fertilization is the process in which two gametes fuse which first creates a zygote and then leads to the development of an embryo. Pollination is a transfer of male pollen to the female reproductive organ. After pollen lands on the stigma, pollen tube begins to grow until it reaches an ovule which is inside the ovary. A nucleus of pollen will fuse with a nucleus of the ovule and that fertilization will occur. 

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