he was working with species of Java, so perhaps some tropical snakes are unusual in this respect.

Of these, 1, 356 ( 33. 6 %) were considered to be threatened and this figure is likely to be an underestimate because it excludes 1, 427 species for which there was insufficient data to assess their status.

Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that nurtured the development of civilization.

In 2008, it was discovered that the inactivation of only two genes in one species of annual plant leads to the conversion into a perennial plant.

Although most extant species of Asteraceae are herbaceous, the examination of the basal members in the family suggests that the common ancestor of the family was an arborescent plant, a tree or shrub, perhaps adapted to dry conditions, radiating from South America.

A number of species have come to be considered invasive, including, most notably in North America, dandelion, which was originally introduced by European settlers who used the young leaves as a salad green.

This fossil was originally described as a species of Australopithecus, but White and his colleagues later published a note in the same journal renaming the fossil under a new genus, Ardipithecus.

The type species, A. sarcophagus, was apparently restricted in range to the modern-day Canadian province of Alberta, after which the genus is named.

It is improbable, however, that the production of amber was limited to a single species ; and indeed a large number of conifers belonging to different genera are represented in the amber-flora.

He was considered the 19th century's leading expert on the geographical distribution of animal species and is sometimes called the " father of biogeography ".

The species was introduced into cultivation at the beginning of the eighteenth century.

No one knows the exact species it was crossed with to produce color variations of white, cream, peach, magenta and nearly red hues.

The program was successful in terms of increasing the population of blue foxes, but their predation of Aleutian Canadian geese conflicted with the goal of preserving that species.

By 1987 a comprehensive survey of the phylum was completed: in all, 4516 species and 339 genera had been named.

When a group of different plant species was prompted by a variety of different stress signals, such as drought or cold, each plant responded uniquely.

Animal species diversity was also significantly impacted: in one study, a Harvard biologist found 24 species of birds and 5 species of mammals in a sprayed forest, while in two adjacent sections of unsprayed forest there were 145 and 170 species of birds and 30 and 55 species of mammals.

According to Ferdinand Bohlmann, the first naturally occurring acetylenic compound, dehydromatricaria ester, was isolated from an Artemisia species in 1826.

The substance so defined was a species.

One of these was the property, an essential universal true of the species, but not in the definition ( in modern terms, some examples would be grammatical language, a property of man, or a spectral pattern characteristic of an element, both of which are defined in other ways ).

A species of Paranthropus, such as Paranthropus robustus, with its crested skull and bipedal gait, was suggested by primatologist John Napier and anthropologist Gordon Strasenburg as a possible candidate for Bigfoot's identity, despite the fact that fossils of Paranthropus are found only in Africa.

The study found that there was ' no verifiable evidence ' of exotic felines loose in Britain, and that the mauled farm animals could have been attacked by common indigenous species.

The Greek words " ida " ( οίδα: know ) and " idos " ( είδος: species ) have the same root as the word " idea " ( ιδέα ), indicating how the Greek mind moved from the gift of the senses, to the principles beyond the senses.

These characteristics originally defined the genus, but not all such species are closely related, and many have been moved to other genera.

Recent research, based on archaeological and paleontological digs on 70 different islands, has shown that numerous species went extinct as people moved across the Pacific, starting 30, 000 years ago in the Bismarck Archipelago and Solomon Islands ( Steadman & Martin 2003 ).

Brackish water puffers may breed in bays in a similar manner to marine species, or may breed more similarly to the freshwater species, in cases where they have moved far enough upriver.

The most recent reclassification moves two species previously placed in Cardaminopsis and Hylandra and three species of Arabis into Arabidopsis, but excludes 50 that have been moved into the new genera Beringia, Crucihimalaya, Ianhedgea, Olimarabidopsis, and Pseudoarabidopsis.

Sometimes they are organized in the same order, other times they have been " edited " — deleted, copied, changed, moved, even relocated to another " book ", as species evolve.

Above the rank of genus, binomial nomenclature and classification are partly independent ; for example, a species retains its binomial name if it is moved from one family to another or from one order to another.

When the original name is changed, e. g. the species is moved to a different genus, both Codes use parentheses around the original authority ; the ICN also requires the person who made the change to be given.

Two other species, Bdellovibrio starrii and Bdellovibrio stolpii, have been moved to a separate genus Bacteriovorax.

The most abundant species, S. macrophylla, was placed on Appendix III in 1995 and moved to Appendix II in 2003.

South American species like the ancestors of the Virginia Opossum ( Didelphis virginiana ) and the armadillo moved into North America, and North Americans like the ancestors of South America's camelids, including the llama ( Lama glama ), moved south.

Only two of these species have been truly domesticated, one ( Apis mellifera ) at least since the time of the building of the Egyptian pyramids, and only that species has been moved extensively beyond its native range.

Some common North American species that have now been moved are:

* Paramyxine ( Note that this genus is considered synonymous with Eptatretus and most species have been moved into that genus with the exception of the following two which are homonyms of current Eptatretus species.

Some species have now been moved out leaving the remaining ones in order Eulipotyphla, within the larger clade Laurasiatheria, which makes up one of the most basic clades of placental mammals.

The Council of Trent taught that only the priest who celebrated Mass was bound by divine law to receive communion under both species, and that Christ, whole and entire, and a true sacrament are received under either form alone, and therefore, as regards its fruits, those who receive one species only are not deprived of any grace necessary to salvation "; and it decreed: " If anyone says that the holy Catholic Church was not moved by just causes and reasons that laymen and clerics when not consecrating should communicate under the form of bread only, or has erred in this, let him be anathema.

It has since been moved to other taxa as a variety, subspecies, or elevated to species rank.

The plot focused on him being moved away to live with his own species by a meddling social-worker ( voiced by Sally Kellerman ).

Eurasia and North America were often connected by the Bering land bridge, and have very similar mammal and bird fauna, with many Eurasian species having moved into North America, and fewer North American species having moved into Eurasia.

In 1927, the naturalist Reginald Innes Pocock declared it a separate species, but reversed this decision in 1939 due to lack of evidence ; but in 1928, a skin purchased by Walter Rothschild was found to be intermediate in pattern between the king cheetah and spotted cheetah and Abel Chapman considered it to be a color form of the spotted cheetah.

In 1928 Beebe and Tee-Van published an illustrated and annotated list of 270 such species, which was expanded in 1935 bringing the total to 324.

in 1928 based on one species.

The one known species, Sphenopsalis nobilis, was also named by Matthew, Granger and Simpson in 1928.

* 1928 – Ernst Mayr leads the first of three expeditions to New Guinea and the Solomon Islands, during which he discovers many new species

It was first found in the United States ( where it is known as Downy brome or Cheatgrass ) in 1861 in New York and Pennsylvania, by 1928 reaching throughout the United States ( including Hawaii and Alaska ), except for Florida and portions of Alabama, Georgia, South Carolina ; it is most abundant in the Great Basin, Columbia Basin, and part of the introduced species that replaced California native plants in the Floristic Province's grasslands and other habitats.

This view eventually prevailed, with the American Ornithologists ' Union removing the species from their list of North American birds in 1923, although others held dissenting views until at least 1928.

While the original Klaatu was simply of a near-human species, in the remake it is stated that Klaatu's race is not remotely human, so that Klaatu's biology was radically altered to give him a human form acquired in 1928.

In subsequent years William Arthur Parks named four other species of Struthiomimus: Struthiomimus brevetertius Parks 1926, Struthiomimus samueli Parks 1928, Struthiomimus currellii Parks 1933 and Struthiomimus ingens Parks 1933.

Austrian ichthyologist Viktor Pietschmann described the prickly shark as a new species in two separate publications: a brief German account in a 1928 volume of Anzeiger der Akademie der Wissenschaften in Wien and a more detailed English account in a 1930 volume of Bishop Museum Bulletin.