Monday, January 26, 2009

Abiotic stress In Plants

A plant’s first line of defense against abiotic stress is in its roots. If the soil holding the plant is healthy and biologically diverse, the plant will have a higher chance of surviving stressful conditions.Facilitation, or the positive interactions between different species of plants, is an intricate web of association in a natural environment. It is how plants work together. In areas of high stress, the level of facilitation is especially high as well. This could possibly be because the plants need a stronger network to survive in a harsher environment, so their interactions between species, such as cross-pollination or mutualistic actions, become more common to cope with the severity of their habitat. This facilitation will not go so far as to protect an entire species, however. For example, cold weather crops like rye, oats, wheat, and apples are expected to decline by about 15% in the next fifty years and strawberries will drop as much as 32% simply because of projected climate changes of a few degrees. Plants are extremely sensitive to such changes, and do not generally adapt quickly. Plants also adapt very differently from one another, even from a plant living in the same area. 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. Hardly any of the responses were similar, even though the plants had become accustomed to the exact same home environment.

Monday, January 19, 2009

Dromedary

The Dromedary camel (Camelus dromedarius) is a large even-toed ungulate. It is often referred to as the one-humped camel, Arabian camel, or simply as the "dromedary". Its native range is unclear, but it was probably the Arabian Peninsula. The domesticated form occurs widely in northern Africa and the Middle East; the world's only population of dromedaries exhibiting wild behaviour is an introduced feral population in Australia.

The dromedary camel is one of the better-known members of the camel family. Other members of the camel family include the llama and the alpaca in South America. The Dromedary has one hump on its back, in contrast to the Bactrian camel which has two. A good mnemonic for remembering which way around these terms apply is this: "Bactrian" begins with "B", and "Dromedary" begins with "D"; "B" on its side has two humps, while "D" on its side has only one hump.

Tylopoda

Tylopoda is a suborder of the mammalian order Artiodactyla, containing the camel family. In the past, this family was much more diverse, containing the families Xiphodontidae, Oromerycidae, and the two families of oreodonts, Agriochoeridae and Merycoidodontidae. However, now it contains only the camels, llamas and alpacas.

Monday, January 12, 2009

Atlantic Ocean

  • Adriatic Sea
  • Aegean Sea
  • Alboran Sea
  • Argentine Sea
  • Bay of Biscay
  • Bay of Bothnia
  • Bay of Campeche
  • Bay of Fundy
  • Baltic Sea
  • Black Sea
  • Bothnian Sea
  • Caribbean Sea
  • Celtic Sea
  • Central Baltic Sea
  • Chesapeake Bay
  • English Channel
  • Gulf of Bothnia
  • Gulf of Guinea
  • Gulf of Finland
  • Gulf of Mexico
  • Gulf of Sidra
  • Gulf of St. Lawrence
  • Gulf of Venezuela
  • Ionian Sea
  • Ligurian Sea
  • Irish Sea
  • Marmara Sea
  • Mediterranean Sea
  • Mirtoon Sea
  • North Sea
  • Sea of Azov
  • Sea of Crete
  • Sea of the Hebrides
  • Sargasso Sea
  • Thracian Sea
  • Tyrrhenian Sea

Wednesday, January 07, 2009

Wool

Wool is the fiber derived from the specialized skin cells, called follicles, of animals in the Caprinae family, principally sheep, but the hair of certain species of other mammals such as goats, llamas, rabbits and keeshonds[citation needed] may also be called wool. Wool has several qualities that distinguish it from hair or fur: it is crimped; it has a different texture or handle; it is elastic; and it grows in staples (clusters).

Thursday, January 01, 2009

Sudbury Basin


The Sudbury Basin, also known as Sudbury Structure or the Sudbury Nickel Irruptive, is the second largest known impact crater or astrobleme on Earth, and a major geologic structure in Ontario, Canada.[

The basin is located on the Canadian Shield in the city of Greater Sudbury, Ontario. The former municipalities of Rayside-Balfour and Valley East lie within the Sudbury Basin, which is referred to locally as "The Valley". The urban core of the former city of Sudbury lies on the southern outskirts of the Basin.

The Sudbury Basin is located near a number of other geological structures, including the Temagami Magnetic Anomaly, the Lake Wanapitei impact crater and the western end of the Ottawa-Bonnechere Graben, although none of the structures are directly related to each other in the sense of resulting from the same geophysical processes.