This is done by attracting bees to plant with flower. As bees feed on nectar, they distribute pollen from plant to plant - a much more efficient and less random process than wind dispersal. This extra food may allow angiosperm seedlings to grow faster, and out compete gymnosperm seedlings. Dispersal - Gymnosperm seed dispersal is done by the wind. Angiosperms have manipulated animals to distribute seeds.
Seed survives and is excreted.
Result - angiosperms can populate remote, previously unoccupied places. Amphibians Amphibians only form a reduced part of fauna through Mesozoic. Reptiles Dinosaurs Evolved from a thecodont ancestor in the Triassic, one of the dominant reptiles of the Permian - Triassic periods. Dinosaurs were hugely successful. All living reptiles are ectotherms .