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Angiosperm in Biological News

Fossil plants bring Wilf distinguished speaker honor

...gene Floras of Patagonia Rediscovered," "Insect-Damaged Fossil Leaves Show How food Webs Respond to Ancient Climate Change and Extinction" and "Fossil angiosperm Leaves: Paleobotany's Difficult Children Prove Themselves." ...

University of Florida study provides insight into evolution of first flowers

... The flower is one of the key innovations of evolution, responsible for a massive burst of evolution that has resulted in perhaps as many as 400,000 angiosperm species. Before flowering plants emerged, the seed-bearing plant world was dominated by gymnosperms, which have cone-like structures instead of flower...

First draft of transgenic papaya genome yields many fruits

...t make the plant resistant to the papaya ringspot virus. The findings appear as the cover article in the journal Nature. Papaya is now the fifth angiosperm (flowering plant) for which detailed genome information is available. The others are Arabidopsis (a well-studied member of the mustard family that inc...

Massive duplication of genes may solve Darwin's 'abominable mystery' about flowering plants

...order to show that such an event occurred early in angiosperm history, dePamphilis and his colleagues had to com...t early in the lineage--with more recently derived angiosperm species, as well as with plant species outside the... duplication that was critical to the evolution of angiosperm flowers. A whole-genome duplication explains the ...
Angiosperm in Biological Definition

Hermaphrodite

...sm. However, this latter condition constitutes monoecy in plants, and is especially common to the conifers , while occurring in only about 7% of angiosperm species (Molnar, 2004). Etymology The term "hermaphrodite" derives from Hermaphroditus , the son of Hermes and Aphrodite in Greek mytho...

Leaf

...ernal link Leaf structure A structurally complete leaf of an angiosperm consists of a petiole (leaf stem), a lamina (leaf blade), and s...onds . Conifer leaves are typically needle-, awl-, or scale-shaped angiosperm (flowering plant) leaves: the standard form includes stipules , petiole ...

Plant

... in Glasgow , Scotland , the stumps of Lepidodendron trees are found in their original growth positions. The fossilized remains of conifer and angiosperm roots, stems and branches may be locally abundant in lake and inshore sedimentary rocks from the Mesozoic and Caenozoic eras. Sequoia and its al...

Plant

... in Glasgow , Scotland , the stumps of Lepidodendron trees are found in their original growth positions. The fossilized remains of conifer and angiosperm roots, stems and branches may be locally abundant in lake and inshore sedimentary rocks from the Mesozoic and Caenozoic eras. Sequoia and its al...
Angiosperm in Biological Dictionary

Angiosperm

Amborella not a "basal angiosperm " ... A theory of much earlier angiosperm origin and proliferation (360 mya) is ... a b c Angiosperm Phylogeny Group (2003) ... any member of the more than 300,000 species of flowering plants (division Anthophyta), the largest and most...

Synergid

... are discussed in the following places at Britannica. Assorted References angiosperm pollination ( in angiosperm (plant): Pollination ) The pollen tube ultimately enters an ovule thro...

Stipule

...cyclopedia ... online encyclopedia article on stipule (plant), The basic angiosperm leaf ... Stipule ,biological,biology dictionary,biology terminology,... Britannica online encyclopedia article on stipule (plant), The basic angiosperm leaf is composed of a leaf base, two stipules , a petiole, and a blad...

Self-incompatibility

... systems ... The molecular bases of self - incompatibility in three angiosperm families—the ... In addition, self - incompatibility has been hypothesiz...d ... self - incompatibility ... of self - incompatibility in three angiosperm families—the Bras ... gametophytic self - incompatibility (GSI) was pres...

Seed plant

...le of gymnosperm and angiosperm... Cycads, like all seed plants , are also heterosporous, unlike the ferns which are ... The is not a unique angiosperm condition, but occurs in all seed plants as well. ... seed plant n. A seed ... Seed plants also differ from ferns in having gametoph...

Seed

...seed n. , pl. seeds or seed . A ripened plant ovule containing an embryo. A propagative part of a plant, ... the funiculus ( seed stalk) in angiosperm seeds . ... seed 1. the mature ovule of a flowering plant. 2. semen. ... Seeds (family name) harvest. grapestone. seedless. teelseed. germi...

Secondary metabolite

...n the following places at Britannica. Assorted References angiosperms ( in angiosperm (plant): Contribution to food chain ) Another aspect of angiosperm diversity is found in the production of secondary compounds, such as alk...

Polar nuclei

... Aspects of the topic polar -nucleus are discussed in the following places at Britannica. Assorted References angiosperm gametophytes ( in plant reproductive system: Angiosperms ) ...micropyle, one functions as an egg. As the pollen tube discharges its contents into...

Parenchyma cells

...l are discussed in the following places at Britannica. Assorted References angiosperm development ( in angiosperm (plant): Ground tissue; ...tissue layer within the epidermis of the leav...

Ovules

...substantially lower than the systemic exposure from ... CLEOCIN Vaginal Ovules are indicated for 3-day treatment of bacterial ... Ovules in ... angiosperm Latin angi-, enclosed; Greek sperma, seed, common name for the division or phylum comprising ... Ovules and seeds are not exclusive to angiosper...
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