Sentences with phrase «in angiosperm»

This process starts with double fertilization in angiosperms and it involves the fusion of the egg and sperm nuclei into a zygote.

The conifer's pores are 100 times larger than those in angiosperms and allow water to pass through relatively easily.

Abstract Polyploidy is a common mode of speciation and evolution in angiosperms (flowering plants).

In his research, Dr. Torres examines the properties of plant polyploidy (genome doubling), the concomitant phenomenon of gene duplication, and the evolution of genes, gene families, chromosomes, and genomes following genome doubling in angiosperms.

Not exact matches

It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth with in the motherplant.

Plants were evolving fast during the Mesozoic, with the rise of cycads, conifers, and especially the angiosperms or flowering plants in the Cretaceous.

Importantly, the Cretaceous - Paleogene extinction event played a role in major radiations of birds, mammals and angiosperms — and this work suggests that it may also have been crucial to boosting calyptrate diversification during the Cenozoic.

Among the plants and trees that exist in our contemporary landscape, angiosperms include almost everything except conifers, ferns, cycads, and ginkgoes.

In fact, the team reports in an upcoming issue of the Proceedings of the Royal Society B, there seems to be no correlation between dino diversity and the proliferation of flowering plants, and there is scant fossil evidence linking angiosperms to the dino dieIn fact, the team reports in an upcoming issue of the Proceedings of the Royal Society B, there seems to be no correlation between dino diversity and the proliferation of flowering plants, and there is scant fossil evidence linking angiosperms to the dino diein an upcoming issue of the Proceedings of the Royal Society B, there seems to be no correlation between dino diversity and the proliferation of flowering plants, and there is scant fossil evidence linking angiosperms to the dino diet.

«A large portion of the flowering plants, or angiosperms, depended on the insects for pollination, and insects were a major factor in creating the soil conditions on which the plants grew,» Wilson says.

«Tricellular pollen develops rapidly after pollination, and so it would be favored in many of the unique lifestyles of angiosperms that demand rapid reproduction, such as herbs, annuals, and herbaceous aquatics,» Williams notes.

In the 1920s it was proposed that tricellular pollen had evolved independently within angiosperms numerous times and was an irreversible state.

There are only 18 known populations of this very special angiosperm in mountainous regions New Caledonia.

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).

Cross-fertilization led to diversification of both plants and their insect predators, culminating in the evolution of the angiosperms.

The angiosperm family Rubiaceae contains the highest diversity of ant plants, and the new study focused on those in the subtribe Hydnophytinae, of which some 100 species are found in southeast Asia and Australasia.

In early angiosperms, a different and much faster mechanism evolved.

«This discovery tells us that angiosperms were already in existence during the Middle Jurassic, and the distribution of the fossils demonstrates that East Asia, and especially northeastern China, is one of the original places of the angiosperms.»

«Angiosperms were not successful until they got the adaptation to drop their leaves,» said study co-author Doug Soltis, a Florida Museum distinguished professor with appointments in UF's biology department and the UF Genetics Institute.

Dogma in the field maintains that angiosperms, as flowering plants are called, evolved from shrubs that resembled modern magnolia trees.

And that would have given the angiosperms the energy to push competitors like conifers out of the canopy around 150 million years ago, making angiosperms the most productive group of land plants in the world.

But about 100 million years ago, newer species of angiosperms had doubled, tripled, and, ultimately, increased by 10-fold the number of leaf veins, the team reported online last week in Ecology Letters.

The study appearing Sunday (Dec. 22) in the journal Nature and co-authored by University of Florida scientists shows many angiosperms, or flowering plants, evolved mechanisms to cope with freezing temperatures as they radiated into nearly every climate during pre-historic times.

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.

Thus, while England's native flora was largely scraped away by glaciers, in the Hengduans a variety of plants flourished — including angiosperms, such as the Magnoliaceae and Ranunculaceae, which originated in the Cretaceous Period.

They think these additional genes paved the way for colorful and more structured and shapely flowers in later evolving angiosperms.

We observed a rapid and distinct increase in plant diversity and origination rates, with a set of new taxa, mostly angiosperms, added to the existing stock of low - diversity Paleocene flora.

These cells are only available in a specific plant class: the angiosperms or flowering plants.

Lineage - specific patterns are also seen: translocations are rare in dipteran flies, and angiosperm genomes seem prone to polyploidization.

We show the utility of this framework by focusing on a clade in the montane angiosperm genus Heuchera, noteworthy in that it experienced ancient introgression from circumboreally distributed species of Mitella, lineages now ~ 1300 km disjunct.

The flowering plants, or angiosperms, appeared in the Mesozoic.

Description: A change state Rockins silk scarf in a fearless angiosperm print.

BEACHCOMBERS TIP: of the two plant types angiosperms (flowering) and gymnosperms (seeds not in a seed case), these are flowering plants, with small non-descript flowers of a sort on the blades.

The implication is that Life On Earth, including gymnosperms, angiosperms, and all terrestrial animals, evolved in much warmer global climates than today.