Until 2007, all clouded leopards living in Asia were thought to belong to a single species.
BBC: Earth News - Clouded leopard: First film of new Asia big cat species
They are not even a single species: there are thought to be about 360 different ones.
Subsequently the family - or perhaps a single species - moved across the super-continent of Gondwana into what is now South America.
Conversely, some flowers, like the showy, fragrant orchid Stanhopea embreei, native to Ecuador, are pollinated only by a single species of bee, in this case Eulaema bomboides.
If birds, as well as mammals, have personalities, it may make it easier to study the evolutionary pressures that give rise to such systematically different ways of behaving within a single species.
The report says that if they eat more than two servings of fish a week they should choose a variety to reduce the chance consuming excess contaminants that might be found in any single species.
However, far from being a single species, it has split into six lines, one of which colonised India and the Middle East, and then spread to Europe at the dawn of agriculture about 10, 000 years ago.
The finches of the Galapagos, known as Darwin's finches, are the best known example, a single ancestral species from South America having given rise to 15 specialized forms in just the last two million years.
WSJ: Matt Ridley on the Possible Formation of a Species | Mind & Matter
Some palaeontologists see a single, variable species called Homo habilis.
Yet, as the National Academy of Sciences has noted, this method is far more unpredictable than inserting a single gene from another species, as was done to produce insect-resistant corn, soybeans and cotton.
International conventions are an essential tool for protecting marine biodiversity, given the lack of physical barriers in the ocean to confine species to a single zone.
Still, the site offers more species-banking information than any other single place, and may help other countries decide whether to introduce species banks of their own.
Do we save a single platypus at the expense of, say, ten species of almost identical dandelions?
Millions of years of natural selection and specialization have led to the instinctual formation of herds by thousands of species over unfathomable stretches of time and on every single continent on earth.
With this huge sum of money Apple could address global biodiversity loss in an instant by single-handedly supporting the efforts to save thousands of endangered species, enlarging protected area networks for biodiversity and indigenous peoples and providing sustainable livelihoods for millions of others, not to mention all those disappearing North American apple habitats.
Coral reefs are home to 25 percent of the world's marine fish species, and cover 1 percent of the Earth's surface, making them the largest single living structure on Earth.
应用推荐