Sentences with phrase «early angiosperms»
Early angiosperms had simple leaf patterns with few veins.
http://www.sciencemag.org/
In early angiosperms, a different and much faster mechanism evolved.
Williams contends that these innovations took hold at least 125 million years ago and made it possible for early angiosperms to evolve more flexible and sheltered modes of fertilization, including ovaries containing egg cells deep inside the plant.
Veins are quite sparse in Amborella (far left), an early angiosperm, but their density has increased through time, with a recently evolved legume (far right) having quite a high concentration of veins.
Not exact matches
«This is the first time that we have a clear vision for the early evolution of flowers across all angiosperms.»
When they corrected for this bias, they found that instead of mirroring the evolutionary expansion of angiosperms, dinosaur diversity peaked 85 million to 55 million years earlier, during the early Jurassic period.
While the majority of angiosperm species disperse their pollen in this early, bicellular, stage of sexual maturity, about 30 % of flowering plants disperse their pollen in a more mature fertile stage, consisting of three cells (a body and two sperm cells).