Monday, March 26 Common to all seeds 1. Female gametophyte retained within the sporophyte, 2. Male gametophyte delivered in the pollen. Male and female cones produce male and female spores.
Pollen tube is very short.
Orchid, trees, lilies, grass, dandelions etc. In gymnosperms the xylem is make up of only tracheids. They serve both as support and transport. Water must pass through the pores which are small and as we shall see in Wed. Lecture, are somewhat occluded.