tag:blogger.com,1999:blog-90816927624146516002012-02-26T21:57:53.284+03:30BiologySh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.comBlogger131100tag:blogger.com,1999:blog-9081692762414651600.post-18042113288383304672011-05-01T22:13:00.003+04:302012-02-26T21:57:53.331+03:30Dear usersDear users:because of some problems this blog will not be updated until 1 July 2012ThanksSh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-5699037973879225502009-10-24T11:20:00.006+03:302009-10-24T11:47:20.884+03:30Atlantic OceanPreliminary information:Total Area:The Atlantic Ocean is essentially an S-shaped north-south channel, extending from the Arctic Ocean in the north to the Antarctic continent in the south and situated between the eastern coast of the American continents and the western coasts of Europe and Africa. Covering approximately 22% of Earth's surface, the Atlantic Ocean is second to the Pacific Ocean in Sh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-50579475975044211472009-10-13T09:10:00.007+03:302009-10-13T09:38:48.648+03:30Movement Euglena gracilis Amoeba Paramecium caudatum Many unicellular organisms swim, glide, thrash, or crawl to search for food and escape enemies. Swimming organisms often move by A.Jhttp://www.blogger.com/profile/11357639338271221721noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-49825400458234626682009-10-13T08:51:00.003+03:302009-10-13T09:09:22.631+03:30Eukaryotic plant cellPlant cells have all the components of animal cells and boast several added features, including chloroplasts, a central vacuole, and a cell wall. Chloroplasts convert light energy—typically from the Sun—into the sugar glucose, a form of chemical energy, in a process known as photosynthesis. Chloroplasts, like mitochondria, possess a circular chromosome and prokaryote-like A.Jhttp://www.blogger.com/profile/11357639338271221721noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-62140083382379678662009-09-18T09:45:00.007+04:302009-10-01T15:15:24.898+03:30Orcinus orcaSh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-86354506918511758062009-08-22T15:29:00.007+04:302009-08-22T15:49:49.854+04:30Taxonomy:Kingdom: AnimaliaPhylum: ChordataSubphylum: VertebrataClass: MammaliaOrder: CetaceaSuborder: OdontocetiFamily: DelphinidaeGenus: OrcinusSpecies: Orcinus orcaEnglish: Killer whaleGerman: SchwertwalSpanish: OrcaFrench: OrquePrelude:The killer whale or orca (Orcinus orca), less commonly, blackfish or seawolf, is the largest species of the Dolphin family. It is found in all the world's Sh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-27526549263453291932009-08-21T11:01:00.005+04:302009-08-21T11:21:39.299+04:30Preliminary information:Total Area:It extends from the Arctic in the north to Antarctica in the south, bounded by Asia and Australia in the west, and the Americas in the east. At 169.2 million square kilometres (65.3 million square miles) in area, this largest division of the World Ocean – and, in turn, the hydrosphere – covers about 46% of the Earth's water surface and about 32% of its total Sh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-45248071900382572262009-08-20T01:25:00.003+04:302009-08-20T01:36:54.600+04:30 Eukaryotic animal cell Eukaryotic cells are typically about ten times larger than prokaryotic cells. In animal cells, the plasma membrane, rather than a cell wall, forms the cell’s outer boundary. With a design similar to the plasma membrane of prokaryotic cells, it separates the cell from its surroundings and regulates the traffic across the membraneThe eukaryotic cell cytoplasm is A.Jhttp://www.blogger.com/profile/11357639338271221721noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-10497602602804958962009-08-05T09:30:00.004+04:302009-08-05T18:11:35.655+04:30زیست شناسی دریااقیانوس:برای تعریف اقیانوسها میتوان گفت،اقیانوس پهنه وسیعی از آب است که بیش از دو سوم سطح زمین را می پوشاند.اقيانوس ها بيشتر سطح زمین يعني حدود 70 درصد سطح زمين را مي پوشانند. اقيانوس ها 97 درصد ذخيره آب روي زمين را در خود دارند. يعني تنها حدود سه درصد آب سطح زمين شيرين است. 78 درصد بارندگي كره زمين بر روي اقيانوس ها رخ مي دهد و اقيانوس ها منبع 86 درصد بخار آب كره زمين هستند. اقيانوس هاي زمين در Sh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-57402831817283419362009-07-31T23:51:00.007+04:302009-08-01T00:37:51.989+04:30Prokaryotic cell Prokaryotic cells are among the tiniest of all cells, ranging in size from 0.0001 to 0.003 mm (0.000004 to 0.0001 in) in diameter. About a hundred typical prokaryotic cells lined up in a row would match the thickness of a book page. These cells, which can be rodlike, spherical, or spiral in shape, are surrounded by a protective cell wall. Like most cells, prokaryotic cells live A.Jhttp://www.blogger.com/profile/11357639338271221721noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-83765290862704346022009-07-23T09:45:00.004+04:302009-07-23T09:45:14.372+04:30زیست شناسی دریا معرفی زیست شناسی دریا : گرایش زیست شناسی دریا، خود يكي از 5 گرايش رشته زيست شناسي است. زيست دريا به بررسي و مطالعه خواص محيط آبي، بيولوژي آبزيان و فعاليتهاي آبزيپروري ميپردازد؛ يعني برخلاف دو گرايش علوم جانوري و علوم گياهي كه در آنها بيشتر موجودات خشکیزي مطالعه ميشوند اين گرايش جانوران و گياهان آبزي را بررسي و مطالعه ميكند. گرايش زيست دريا علاوه بر Sh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-27297736176307064242009-07-20T12:59:00.004+04:302009-07-23T10:27:35.552+04:30cellCell ,basic unit of life. Cells are the smallest structures capable of basic life processes, such as taking in nutrients, expelling waste, and reproducing. All living things are composed of cells. Some microscopic organisms, such as bacteria and protozoa, are unicellular, meaning they consist of a single cell. Plants, animals, and fungi are multicellular; that is, they are composed of a great A.Jhttp://www.blogger.com/profile/11357639338271221721noreply@blogger.com0tag:blogger.com,1999:blog-9081692762414651600.post-39047458891284195472009-07-06T15:40:00.000+04:302009-07-06T15:41:39.310+04:30Sh.Zhttp://www.blogger.com/profile/13345450859757061322noreply@blogger.com0