Gymnosperm means blank and an example of this type of plant is a blank

9. They are fertilized by blank

naked seed, Conifers, pollen grains (male gametophyte)

Explanation:

Gymnosperms are known as seed producing plants. the term gymnosperm means is naked seed that means that the seed in gymnosperm plants are non-encased while in angiosperms seed are covered within an ovary.

Conifers is an example of gymnosperms plants. Other example of gymnosperms are cycads, gnetophytes and ginkgoes.

Gymnosperms are fertilised when pollen grains (male gametophyte) are carried by the wind to the open end of an ovule, which contains the eggs, or female gametophyte. The ovule formed is converted into naked seed.

Hene, the correct answer for blanks are naked seed, Conifers, pollen grains (male gametophyte).