These formations may have resulted from carcass burial in an anoxic environment with minimal bacteria, thus slowing decomposition. Stromatolites Lower Proterozoic Stromatolites from Bolivia , South America Stromatolites are layered accretionary structures formed in shallow water by the trapping, binding and cementation of sedimentary grains by biofilms of microorganisms , especially cyanobacteria. While older, Archean fossil remains are presumed to be colonies of cyanobacteria , younger that is, Proterozoic fossils may be primordial forms of the eukaryote chlorophytes that is, green algae. One genus of stromatolite very common in the geologic record is Collenia. The earliest stromatolite of confirmed microbial origin dates to 2. The most widely supported explanation is that stromatolite builders fell victims to grazing creatures the Cambrian substrate revolution , implying that sufficiently complex organisms were common over 1 billion years ago. Factors such as the chemistry of the environment may have been responsible for changes. Cyanobacteria as well as extremophile Gammaproteobacteria are thought to be largely responsible for increasing the amount of oxygen in the primeval earth’s atmosphere through their continuing photosynthesis. Cyanobacteria use water , carbon dioxide and sunlight to create their food. A layer of mucus often forms over mats of cyanobacterial cells.
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Buildings 70 pics Avatars are small pictures that are used to represent yourself during online chatting, blogging, dating and on websites. Avatars are also used on websites like MySpace, Xanga, Yahoo, phpbb, LiveJournal, and many other chat forums and communities. However, permission to allow users to have avatars is controlled by the administrators of the message boards, forums, blogs, myspace, yahoo etc
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The Morrison Formation of the United States and the Solnhofen Limestone of Germany , both famous for their exceptionally well-preserved fossils, are geologic features that were formed during Jurassic times. The Jurassic was a time of significant global change in continental configurations, oceanographic patterns, and biological systems. During this period the supercontinent Pangea split apart, allowing for the eventual development of what are now the central Atlantic Ocean and the Gulf of Mexico.
Heightened plate tectonic movement led to significant volcanic activity , mountain-building events, and attachment of islands onto continents. Shallow seaways covered many continents, and marine and marginal marine sediments were deposited, preserving a diverse set of fossils. Rock strata laid down during the Jurassic Period have yielded gold, coal, petroleum, and other natural resources. International Commission on Stratigraphy ICS During the Early Jurassic, animals and plants living both on land and in the seas recovered from one of the largest mass extinctions in Earth history.
Many groups of vertebrate and invertebrate organisms important in the modern world made their first appearance during the Jurassic. Life was especially diverse in the oceans—thriving reef ecosystems, shallow-water invertebrate communities , and large swimming predators, including reptiles and squidlike animals. On land, dinosaurs and flying pterosaurs dominated the ecosystems, and birds made their first appearance.
Early mammals also were present, though they were still fairly insignificant. The Jurassic Period was named early in the 19th century, by the French geologist and mineralogist Alexandre Brongniart , for the Jura Mountains between France and Switzerland.
New documents show otherwise. All invoked their Fifth Amendment right against self-incrimination. The documents show that Backpage hired a company in the Philippines to lure advertisers — and customers seeking sex — from sites run by its competitors. The spreadsheets, emails, audio files and employee manuals were revealed in an unrelated legal dispute and provided to The Washington Post.
Workers in the Philippine call center scoured the Internet for newly listed sex ads, then contacted the people who posted them and offered a free ad on Backpage. Then, when a potential customer expressed interest, an email directed that person to Backpage.
Looking to give up her day job but maintain a steady income, the author joined a Web site where rich older men shop for girlfriends. Is that so wrong?
Indira Gandhi Zoological Park Indira Gandhi Zoological Park is one amongst the largest zoos of India, sited in the natural surroundings of a reserve forest. Sprawled in an area of acres, the park was named after Indira Gandhi – the former Prime Minister of India. It was opened to the public in the year Kailasagiri Perhaps Kailasagiri is the most beautiful places in the expanse of Vizag. Perched on a hilltop, it is an interesting place that certainly looks like the abode of God.
It also offers spectacular view of both Rishikonda and Ramakrishna Beach. Over and above, the pleasant atmosphere and scenic beauty make this place worth-visiting. With a height of meters, the landmark is a rock in the shape of a Dolphin’s nose. It’s a promontory and also has a lighthouse, which is conceivably the oldest lighthouse in India.
Bulletin of Marine Science. Bermuda Natural History Museum. The issue prior to July 14, had an inventory by Dr. Wolfgang Sterrer on the number of species at least 8, of flora and fauna then in Bermuda, of which 4, are marine and 3, are terrestrial.
Speciation is the evolutionary process by which populations evolve to become distinct biologist Orator F. Cook coined the term in for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his book The Origin of Species.
January Fossils provide a record of the history of life. Smith is known as the Father of English Geology. Our understanding of the shape and pattern of the history of life depends on the accuracy of fossils and dating methods. Some critics, particularly religious fundamentalists, argue that neither fossils nor dating can be trusted, and that their interpretations are better. Other critics, perhaps more familiar with the data, question certain aspects of the quality of the fossil record and of its dating.
These skeptics do not provide scientific evidence for their views.
Chatting online is fun, but do you know who you’re actually talking to? Personal safety when meeting someone in person who you met online. Fraud, when people appeal appeal to your better nature to help them out of an ‘unfortunate situation’ by sending money. People masquerading as somebody who they are not. Spam , selling or fraud, especially romance fraud. Webcam blackmail, where fraudsters record things you may do in front of your webcam then use the recording to extort money.
A church in northern Israel where Christians believed Jesus performed a miracle has reopened almost two years after an arson attack by Jewish extremists.
When did the first sharks appear on Earth? In other words, because humans the animal that many consider to be the most highly evolved on Earth start life with cartilaginous skeletons, which later undergo a process of ossification turning to bone , having a cartilaginous skeleton must be a primitive trait. This is a quaint notion, but inherently wrong. Leaving aside the recent discovery that Haeckel appears to have faked his results, one major problem with this idea is that evolution has no ultimate goal.
Even if we fail to consider the inherent problems associated with comparing evolutionary trends across lineages which is a big evolutionary no no! Moreover, a paper published in the journal Genetics by a French research team led by Christiane Delarbre at the Institut Pasteur back in , produced a phylogenetic analysis i.
There is also evidence to suggest that bony fishes appeared in the fossil record before the Chondrichthyes, not the other way around as is frequently cited.
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Plant reproduction Animals typically produce gametes directly by meiosis. Male gametes are called sperm, and female gametes are called eggs or ova. In animals, fertilization follows immediately after meiosis.
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Hesse Kassel Hesse Kassel is an Australian economist. He stopped chasing money and chased women and made children instead. He blogs right here Muslims account for over twenty percent of the population of the world and more than that fraction of prime-aged girls. For religious and cultural reasons these girls tend to be quite inaccessible to outsiders and often have their romantic and sexual choices restricted or simply made on their behalf.
A high proportion of Muslim girls, families, and communities take religious and cultural practices and rules seriously. These practices include an outright ban on romantic and sexual contact with non-Muslim men. That makes them a difficult, but not impossible challenge for an outsider. The journey to success with a Muslim girl is often challenging but can be a rewarding one. This article attempts to offer some guidance on what a man should expect on this journey.
All points are generalizations only, based on the personal experiences of the author, who is not a Muslim. As with any other religious group there is a high level of variation between individuals within that group. These points should only be seen as tendencies to look out for and warnings of what to be prepared for, not as certainties.
Freshwater Fishes of Iran
A study of biology includes the study of the chemical basis of living organisms, DNA. Other related sciences include microbiology and organic chemistry. The word science comes from a Latin word scientica, which means knowledge, or information. Science is a process of systematically gathering detailed information and gaining exact knowledge. We do not know all the “life” information secrets but we are learning more every day.
Jurassic Period: Jurassic Period, second of three periods of the Mesozoic Era. Extending from million to million years ago, the Jurassic was a time of global change in the continents, oceanographic patterns, and biological systems. On land, dinosaurs and flying pterosaurs dominated, and birds made their first appearance.
Italy ; see below. All these ornaments are called “eluminures”, illuminations, or miniatures, a world used since the end of the sixteenth century. At first the “miniator” was charged with tracing in red minium the titles and initials. Despite its limitations, the art of illumination is one of the most charming ever invented; it exacts the same qualifications and produced almost as powerful effects as painting ; it even calls for a delicacy of touch all its own.
And whereas most of the paintings of the Middle Ages have perished, these little works form an almost uninterrupted series which afford us a clear idea of the chief schools of painting of each epoch and each region. In the Orient must be sought the origin of this art, as well as that of the manuscripts themselves. The most ancient examples are found on Egyptian papyri, where in the midst of the texts, and not separated from it, portraits are painted, most frequently in profile, according to the Egyptian method.
After having drawn the outline in black in the artist filled in the drawing in colours. The art seems to have been also cultivated by the Greek artists of Alexandria. The papyrus containing the poems of Timotheus fourth century B. A fragment of a romance on a papyrus Paris, Bib.
Recent Fossils Grand Canyon has so much more than pretty scenery. It contains an amazing diversity of rock formations with an abundance of fossils hidden within. The sedimentary rocks exposed throughout the canyon are rich with marine fossils such as crinoids, brachiopods, and sponges with several layers containing terrestrial fossils such as leaf and dragonfly wing impressions, and footprints of scorpions, centipedes, and reptiles. Ancient fossils preserved in the rock layers range from algal mats and microfossils from Precambrian Time 1, million to million years ago to a multitude of body and trace fossils from the Paleozoic Era million years ago.
What about dinosaur fossils?
“Development of a prototype for modelling soil–pipe interaction and its application for predicting uplift resistance to buried pipe movements in sand” by Yousef Ansari, George Kouretzis, and Scott W. Sloan.
Get in to take a step back. Living tale of nature. The Belum Temenggor forest reserve forms the last and largest contiguous block of natural forest in Peninsular Malaysia. It covers an area of over , hectares. It is located in the Malaysian state of Perak and crosses into Southern Thailand. In the heart of the forest lies a lake: It covers 15, Hectares, with hundreds of tiny islands. In addition, the forest is home to a vast number of species of animals and plants.
Many of them cannot be found anywhere else on Earth.
History of speciation In addressing the question of the origin of species, there are two key issues: Since Charles Darwin’s time, efforts to understand the nature of species have primarily focused on the first aspect, and it is now widely agreed that the critical factor behind the origin of new species is reproductive isolation. Why do species exist? Why is not all nature in confusion instead of the species being, as we see them, well defined? Darwin pointed out that by the theory of natural selection “innumerable transitional forms must have existed,” and wondered “why do we not find them embedded in countless numbers in the crust of the earth.
Martin Joergensen Highlander split cane, Hardy Perfect He uses this rod for his home rivers, the Danish Karup and Skjern, hunting for salmon and sea trout. When going to Norway’s larger rivers he “cheats” and uses a 14′ Hexagraph rod, which is a carbon fiber rod, but has the action and look of split cane. With these combos he raids the Danish and Norwegian salmon rivers and as you can well imagine, attracts quite some attention when he reveals his gear and opens his flyboxes full of classical full dressed flies.
The line was a special order from Phoenix in France. I can’t imagine they get many orders for weight silk lines these days, and according to Niels the delivery also took many weeks because they had to make it for him. There are probably few two hand silk lines in stock anywhere. The line is beautiful and casts like a dream says Niels who has fished it a few times already.
He tells me that the casting pace and rhythm of his setup has to be deliberately slow, but that both reach and presentation is on par with anything he has tried. The reel is a newly made Hardy Perfect four-and-three-quarter inches – no.