Final answer:
Ginkgo sperm are flagellated and play a crucial role in fertilization in Ginkgo trees. They swim to the female gametophyte to fertilize the egg. Flagellated sperm are unique to Ginkgo, cycads, and some gnetophytes.
Step-by-step explanation:
Ginkgo sperm are flagellated and are a part of the male reproductive system in Ginkgo trees. The male plants produce pollen in cones, and the pollen is dispersed to female cones by the wind. Once in the cone, the pollen germinates and produces flagellated sperm that swim to the female gametophyte and fertilize the egg to form a zygote. Flagellated sperm are rare in seed plants and are found only in Ginkgo, cycads, and some gnetophytes.