The question contains the answer.
Angiosperms
A simple answer is that they have evolved complex relationships to animal pollinators and seed dispersers, whereas gymnosperms rely on wind pollination and seed dispersal, and ferns and the other lower plants need water. Angiosperms also have vessels in their xylem, which is much better at transporting water quickly. (of course, they have problems of their own) Also, they have fruits enclosing seeds
the whole generation coming down to 21st century is due to reproduction,humans still haven't developed any technology for reproduction without girls. another aspect of it is related to us emotionally,as its always said behind every successful man there is a woman.
Yes, they are flowering plants. botany goes down easy- all known developed plants are either angiosperms- Flowering, like Roses , or Gymnosperms- such at the familiar evergreen Christmas Tree. It meant Naked sperm, nothing to do with Gym classes.
The Duryea Brothers
Angiosperms contain both seeds and flowers, while gymnosperms only contain seeds. Instead of relying on wind pollination, angiosperms attract bees and other insects (with the colors and decor of their flowers), whom which collect and distribute pollen (insect pollination). Insect pollination is more reliable than wind pollination.
No, Rwanda is not considered a developed nation, but rather a developing nation.
its a developed country
Cattails are vascular because they belong to Angiosperms. All angiospermic plants have well developed vasculature in the form of xylem and phloem.
John Deere developed the first successful steel plow in 1837.
Marine plants had tp overcome the obstacles presented by a dry enviorment by making adaptations to their structures. They developed an outer, waxy surface to reduce water loss, they developed seeds and spores in order to facilitate reproduction, and they deleopled mycorrhizae to help absorb nutrients from soil.
Robert fulton