Answer:
Gingko biloba and ferns are examples of seed plants with flagellated sperms.
Step-by-step explanation:
Flagellated sperm reminds the origin of life in water and flagellated sperms was an adaptation to enable sperm movement in water. After several phases of evolution flagellated sperm feature is rarely found in plants.
Infact all of the angiosperms and a large population of gymnosperms lack flagellated sperm. Gingko biloba is a gymnosperm found in China and is the last remaining species of the division Gingkophyta.
It grows up to a height of 20-35 meters and is well known for its medicinal properties. Ferns have flagellated sperm and it is a sign that ferns have been existing on the earth before many long years.