6. angiosperms and gymnosperms differ from each other in that: a. angiosperms have roots and stems while gymnosperms do not. b. angiosperms use pollen while gymnosperms use cones. c. angiosperms have a single fertilization process while gymnosperms use double fertilization. d. angiosperms have spores while gymnosperms do not. e. angiosperms tend to rely on animal pollinators while gymnosperms tend to rely on wind pollination.