Tag Archives: Biology

health: One Kiss Carries 80 Million Bacteria


One Kiss Carries 80 Million Bacteria

This latest research may make you think twice before locking lips with anyone. The mouth is home to tens of millions of bacteria, and just one 10-second kiss can transfer as many as 80 million of them. The good news, if you want to call it that, is that while bacteria in the saliva seem to change quickly following a kiss, populations on the tongue remain more stable. This finding is important to researchers, as it could help with the development of bacterial therapies and treatments. More… Discuss

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ARTICLE: WHITE TIGERS


White Tigers

With their striking coloration, white tigers are popular attractions at zoos and in other forms of entertainment that showcase exotic animals. Their white coats can be pure white, but more often they have dark stripes. Though these tigers seem exotic, they are not their own subspecies. Rather, they are a selectively bred mutant form of normal orange tigers. Because of the extreme rarity of the white tiger allele, white tigers are often inbred, which leads to what health problems? More… Discuss

 

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GIRAFFES


Giraffes

The tallest of animals, giraffes can be found browsing the tree canopy of tropical Africa‘s wooded grasslands. A male giraffe can be 18 feet (5.5 m) from hoof to crown with a neck up to 7 feet (2.1 m) long. However, a giraffe’s body is relatively short, marked with large, angular, sandy to chestnut spots closely spaced on a lighter background. Giraffes travel in small herds led by a male and can outrun most enemies, some of which they can kill with a single kick. How tall is a newborn giraffe? More… Discuss

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ARTICLE: THE CLOUDED LEOPARD


The Clouded Leopard

The clouded leopard prowls the Himalayan foothills. It is only distantly related to its namesake but does share the leopard’s dark spots. As the smallest of the big cats, the clouded leopard is considered an evolutionary link between big cats and small cats. It is known for its excellent climbing ability—the clouded leopard can climb down trees headfirst—and frightening canine teeth—the largest of any cat in proportion to body size. What nickname has it been given due to this latter feature? More…

 

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WORD: CALCAREOUS


calcareous 

Definition: (adjective) Of, containing, or resembling calcium carbonate.
Synonyms: chalky
Usage: Immense accumulations of bird-guano gave the sides of Mount Mendif the appearance of calcareous rocks. Discuss.

 

AUROCHS


Aurochs

The probable ancestors of modern cattle, aurochs once inhabited forests in Northern Africa, Europe, and Southwest Asia. The enormous—having a shoulder height of around 6 ft (1.8 m)—horned, black oxen are depicted in prehistoric cave paintings, and the species endured until the 17th century, when the last known aurochs died in Poland. Breeders have since tried to recreate the extinct species, but none have yet managed to produce a genetically identical animal. What has arisen from their efforts?More… Discuss

 

THE SNOWY OWL


The Snowy Owl

Easily recognized by its snow-white plumage, the snowy owl is most commonly found in the Arctic tundra but is sometimes seen in Europe, Asia, and North America. It is even the official bird of Quebec. The large owl has broad wings, a round head, and may have some dark markings. After snowy owl eggs hatch, both parents feed and protect their young. Their alarm call is almost like a bark, and they often clap their beaks when threatened. What popular book series features a snowy owl? More… Discuss

 

FOUNDER EFFECT (Hannibal Lecter)


Founder Effect

The founder effect is a form of genetic drift that occurs when a small group in a population splinters off and forms a new one. These founders can strongly affect the new colony’s genetic makeup far into the future, since their small gene pool may be unrepresentative of that of the population at large. Down the line, this can result in an increase in recessive traits, even maladaptive ones, like certain genetic diseases. What are some communities that have been impacted by the founder effect? More… Discuss

 

Haiku- Venomous fangs (poetic thought by George-B)


Haiku- Venomous fangs (poetic thought by George-B)

Rattlesnakes rattlers

warning of venomous fangs
paralyze fear.

Warning about Brown Widow Spiders In SoCal-Orange County – via KTLA


Warning about Brown Widow Spiders In SoCal-Orange County

Warning about Brown Widow Spiders In SoCal-Orange County

The spider Latrodectus geometricus, commonly known as the brown widow, grey widow, or geometric button spider, is one of the widow spiders in the genus Latrodectus. As such, it is a “cousin” to the more famous Latrodectus mactans. The brown widow is found in parts of the southeastern, southern and southwestern United States (including Florida, Alabama, California, Oklahoma, Nevada, Louisiana, Mississippi, Georgia, South Carolina, North Carolina, Tennessee, Arizona, New Mexico and Texas); as well as in parts of Australia, Afghanistan, South Africa and Cyprus.[citation needed] The origin of this species is uncertain, as specimens were independently discovered in both Africa and the Americas. They are usually found around buildings in tropical areas.
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Source: http://en.wikipedia.org/wiki/Latrodectus_geometricus)

Article of the Day (June 30): Neurogenesis


Neurogenesis

The human nervous system is composed of some 200 billion cells called neurons, about half of which are found in the brain. Neurogenesis, the process through which neurons are formed, is most active during prenatal development. Though early neuroanatomists believed that the adult nervous system is fixed and incapable of regeneration, neurogenesis actually continues throughout life. Studies have shown that lack of sleep reduces neurogenesis and exercise increases it. How is it affected by stress? How physical exercise help the aging body and the brain?More… Discuss

Today’s Birthday: George Gaylord Simpson (1902)


 Today’s Birthday

George Gaylord Simpson (1902)

 Simpson, an American paleontologist, helped develop the modern biological theory of evolution, drawing on paleontology, genetics, ecology, and natural selection. His contributions to evolutionary theory include a detailed classification of mammals, which is still the standard, and the discovery of the migratory and evolutionary patterns of the prehistoric fauna of the Americas, from which he deduced that species reached adaptive peaks and suffered accidental dispersal. What word did he coin? More… Discuss