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Ferns in Medical News

Primitive Plants Have Complex Sex Life

...ate pollinating insects, a new study reveals. Cycads, a group of plants that has been around for 250 million to 290 million years, look similar to ferns or palms but are not related to them. Cycads are gymnosperms, a group that also includes modern coniferous tress such as pines and firs. Reporting ...
Ferns in Biological News

Ferns took to the trees and thrived

...lant communities during the Cretaceous period, the ferns that had preceded them hardly saw it as a disappoi...n tropical rain forests were becoming established, ferns climbed aboard, and experienced a flowering of the...y of Sciences . Though ancient, it appears that ferns really came into their own during a very hot, very...

Changing climate likely to make 'super weed' even more powerful

...anced effects against the native species of Phragmites , which is becoming increasingly endangered in the United States. Walnut trees, pine trees, ferns and sunflowers are among the plants that release harmful chemicals to prevent other plants from growing too close to them. However, Phragmites us...

Missouri Botanical Garden mounts milestone 6 millionth herbarium specimen

...barium is essentially a "library" of plant specimens. The Garden's herbarium includes about five-and-a-half-million vascular plants (flowering plants, ferns and conifers) and 500,000 bryophytes (mosses, liverworts and hornworts). The bryophyte collection is also one of the largest of its kind in the world....

Fossils excavated from Bahamian blue hole may give clues of early life

...aco plant fossils right in with the vertebrates, so we can reconstruct the habitats in a much more sophisticated way. For instance, because bracken ferns are one of the first plants to recolonize after a fire, the presence of their spores would indicate regular burning in prehistoric times and indicate ...

Dinosaur from Sahara ate like a 'mesozoic cow'

...ad above its back, Nigersaurus operated more like a Mesozoic cow than a reptilian giraffe, mowing down mouthfuls of greenery that consisted largely of ferns and horsetails. Details of the dinosaurs anatomy and lifestyle will be published Nov. 21, 2007, (available Nov. 15) in PLoS ONE, the online journal...

UD plant biologists uncover top wetland plant's hidden weapon

...t the growth of another plant. He refers to these plants with the capability to wage chemical warfare as natural killers. Walnut trees, pine trees, ferns and sunflowers are among the plants that release harmful chemicals to prevent other plants from growing too close to them. However, Phragmites uses...

Prehistoric mystery organism verified as giant fungus

...gic time, terrestrial Earth looked quite alien in comparison to the modern world. Simple vascular plants, the ancestors of the familiar conifers, ferns and flowering plants of today, began to diversify on land during the Devonian Period. "Initially, they’re just stems. They don’t have roots. They don’...

Ferns provide model for tiny motors powered by evaporation

... Scientists looked to ferns to create a novel energy scavenging device that uses the power of evaporati... But something else in the book caught her attention---the section on how ferns spread their spores. "It's essentially a microactuator," said Maharbiz, ...

Diverse tropical forests defy metabolic ecology models

... their money. Trees range from spindly understory shrubs to enormous buttress-rooted rainforest giants festooned with vines and peppered with orchids, ferns and bromeliads. Tropical trees depend on animals for pollination and seed dispersal and are constantly assaulted by insects, fungi, maelstrom and mach...
Ferns in Biological Definition

Cladistics

...r instance, hardened front wings are a synapomorphy of beetles , while circinate vernation , or the unrolling of new fronds, is a synapomorphy of ferns . Several more terms are defined for the description of cladograms and the positions of items within them. In an upright cladogram (one with species...

Leaf

... for other purposes. The comparable structures of ferns are correctly referred to as fronds . ... of photosynthesis are called assimilates ). In ferns and most flowering plants the mesophyll is divided...ns) at Wikibooks . Basic leaf types : ferns have fronds . Conifer leaves are typically ...

Plant

...ch specimens may be cut and polished using lapidary equipment. Fossil forests of petrified wood have been found in all continents. Fossils of seed ferns such as Glossopteris are widely distributed thoughout several continents of the southern hemisphere , a fact that gave support to Alfred Wegener...

Plant

...ch specimens may be cut and polished using lapidary equipment. Fossil forests of petrified wood have been found in all continents. Fossils of seed ferns such as Glossopteris are widely distributed thoughout several continents of the southern hemisphere , a fact that gave support to Alfred Wegener...
Ferns in Biological Dictionary

Vascular plants

...ant body ... vascular plant n. Any of various plants , such as the ferns and seed-bearing plants , in which the phloem transports sugar and the ...record during the mid-Silurian period, ... SEEDLESS VASCULAR PLANTS . ferns and allies. Characteristics. No seed s. Vascular tiss ue prese n t ... ...

Tracheophytes

...s all the ... The more highly evolved tracheophytes , on the other hand, have developed ... vascular plant n. Any of various plants, such as the ferns and seed-bearing ... Vascular plants (also known as tracheophytes or higher plants) are those plants ... Embryophyte Land plants Fossil range: La...

Sorus

...ision – in botany) ... A plant nursery specializing in Michigan native ferns and woodland wildflowers. ... Sorus Plants. Michigan native ferns and woodland wildflowers. Sorus Plants ... Sorus - Definition of So...

Seedless vascular plants

...plants typically live in wet, humid places. Whisk ferns ... This site provides an overview and genera... plants ? ... SEEDLESS VASCULAR PLANTS . ferns and allies. Characteristics. No seed s. Vascula...vascular plants are lycophytes, horsetails, and ferns ... Horsetails (Sphenophyta) are seedless vascu...

Seed plant

...... Cycads, like all seed plants , are also heterosporous, unlike the ferns which are ... The is not a unique angiosperm condition, but occurs in all...ell. ... seed plant n. A seed ... Seed plants also differ from ferns in having gametophytes that ... land-based adaptation of seed plants ...

Rhizoid

...fern gametophytes attach to the substratum and absorb nourishment rhizoid any of various slender filaments that function as roots in mosses and ferns and fungi etc ... What is the difference between Stolon and Rhizoid ? ... Definition of rhizoid from the Merriam-Webster Online Dictionary wit...

Homospory

...y are discussed in the following places at Britannica. Assorted References ferns ( in fern (plant): Size ) Most ferns are homosporous, each plant having spores of one shape and size, usually ...

Heterosporous

...fe cycles ... Examine the array of heterosporous ferns on display, acquainting yourself with ... Hete...ilial order of heterosporous , leptosporangiate ferns (Polypodiophyta); leaves arise on long Vascular... such as spikemosses, quillworts, and some aquatic ferns ... which ones are homosporous and which are h...

Frond

... A frond is a large leaf with many divisions to it, and the term is typically used for the leaves of palms, ferns or cycads. Palm branch (symbol) From Wikipedia, the free encyclopedia (Redirected from Palm frond ) ... shown holding a palm frond , represen...
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