Share5 Shares 26K Evolution is one of the greatest scientific discoveries of all time. Armed with the knowledge of the interconnectedness of all life on earth, biologists have made startling discoveries.
Definition and boundaries of Asia The land mass of Asia is not the sum of the land masses of each of its regions, which have been defined independently of the whole.
For example, the borders of Central Asia and the Middle East depend on who is defining them and for what purpose. These varying definitions are not generally reflected in the map of Asia as a whole; for example, Egypt is typically included in the Middle East, but not in Asia, even though the Middle East is a division of Asia.
The border with Europe starts with the coast of the eastern Mediterranean, even though Turkey in the Near East extends partly into the Aegean Islands and includes Istanbul on the European side of the Bosphorus.
On the north the boundary between the continents of Asia and Europe is commonly regarded as running through the Dardanellesthe Sea of Marmarathe Bosporusthe Black Seathe Caucasus Mountainsthe Caspian Seathe Ural River to its source, and a long border generally following the eastern side of the Ural Mountains to the Kara SeaRussia.
The Arctic Ocean is the northern border. On the southeast of Asia are the Malay Peninsula the limit of mainland Asia and Indonesia "Isles of India", the former East Indiesa vast nation among thousands of islands on the Sunda Shelflarge and small, inhabited and uninhabited.
Australia nearby is a different continent. Most of the islands in the Indian Ocean are Asian. Overall dimensions[ edit ] Different sources give different estimates of the area enclosed by the imaginary border of Asia. The map surface of mainland Asia is entirely contained within a Geodetic quadrangle formed from segments of latitude going through its north and south extremes and segments of longitude passing through the east and west extremes.
Indonesia to the southeast, a nation consisting of thousands of islands, adds a significant amount of territory to mainland Asia and extends the extreme Asian latitude further south. The geographic nature of the country raises such questions as whether the sea and the seabed count as Asia.
The Australia—Indonesia border is still being negotiated. Currently a treaty remains unratified. As there are questions of fishing rights in the waters and mineral rights in the seabed, two different boundaries are being negotiated, one for the water column and one for the seabed.
Views of Asia[ edit ] The geographical or traditional view[ edit ] Medieval Europeans considered Asia as a continenta distinct landmass.
The European concept of the three continents in the Old World goes back to classical antiquity. Definition of continents has long been and remains primarily the realm of geographersincluding cultural geographers as well as physical geographers.
The three-continent system was an idea devised in Archaic Greecea time of Greek colonial expansion and trade throughout the Mediterranean and the spread of writing again.
Writing is a prerequisite of written geography. It had been lost during the preceding Greek Dark Agesa period of piracy at sea and defensive parochialism on land. The preceding Mycenaean Greece left scant record of some serving women from a locality in the later Asia Minor called Asia. Europe was mainly Greece, while Libya was a small region to the west of Egypt.
There was no systematic definition of "continent;" however, the Greek mariners did make a distinction that was to become one: In Latin it became continens terra, "the continuous land," shortened to just continens, stem continent.
Most ships of the Archaic Period were not ocean-going.The invasive Asian shore crab, Hemigrapsus sanguineus, is a particularly successful invasive decapod crustacean species which is now found in estuaries and open coasts in areas along the western North Atlantic and western Europe, displacing resident species (Lohrer et al., ; Brousseau et al., ; Van den Brink, Wijnhoven & McLay, ; Landschoff et al., ; Gothland et al., ; Gothland et al., .
Asian Americans on historical and recent U.S. censuses (Box 2). 1 For a discussion of the origins of the term “model minority,” see Chan, Sucheng. Asian Americans: An Interpretive History. Boston: Twayne Publishers. Chan argues that this term was used .
The species that I was researching, the Asian shore crab, is taking over Maine ecosystems and other ecosystems, too, and we should put a stop to it. The Asian shore crab (Hemigrapsus sanguineus) is an invasive species in New England which feeds on the native blue mussels. It has recently been observed that mussels, when they detect Asian shore crabs, develop thicker shells to stop the crabs eating them.
Asian Shore Crab (Hemigrapsus sanguineus) The Asian Shore Crab is a species of crab from East Asia. It is now an invasive species in North America and Europe. It has a squarish carapace which can be up to two inches in width, with three teeth along the sides.
It is marked with alternating light and dark bands. The Asian shore crab invaded parts of the eastern coast of the United States about 15 years ago. The Asian shore crab preys on blue mussels.
In the time since the Asian shore crab arrived, the average shell thickness has increased in the blue mussel population.