| 1 | In the angiosperm the seeds are wrapped in an additional layer of covering. | |
| 2 | Lotus plant is the origin in angiosperm is the earliest kind belong to one of. | |
| 3 | "The origin and diversification of angiosperms." Nature 374: 27-33. | |
| 4 | The evolution of flowering , as represented by this angiosperm, first appears in the fossil in this time period. | |
| 5 | Functions of Calcium during fertilization of angiosperm is one of research focuses for botanists. |