the basis of their cellular characteristics. For example‚ prokaryotic cells lack a nucleus and other memorane‐bound structures known as organelles‚ while eukaryotic cells have both a nucleus and organelles (Figure ). The important cellular features of (a) a prokaryotic cell (a bacterium) and (b) a eukaryotic cell. Prokaryotic and eukaryotic cells are similar in several ways. Both types of cells are enclosed by cell membranes (plasma membranes)‚ and both use DNA for their genetic information
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land; instead‚ they dwelled in the sea where a vast array of organisms thrived. The fossil records beautifully preserved in the shale rock‚ tell the story of the Cambrian Explosion‚ a period where organisms evolved at an explosive rate into many diverse creatures that are the ancestors to many of the organisms today‚ including humans. Over the past century‚ the Burgess Shale has unearthed new books to earth’s history and still holds new secrets for scientist to find. The discovery of the rock formation
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ENPE 573 – Unconventional Gas Exploitation Introduction to Shale Gas Classification‚ Formation‚ & Extraction Abstract The production of conventional gas has been declining over the last few years due to dwindling reserves. To counter-act this decline‚ companies are quickly turning to unconventional gas plays that can offer even greater reserves as shown in figure 1. Unfortunately‚ recovering unconventional gas is a very difficult process that requires advanced stimulation and/or
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it affordably and safely from deep shale formations throughout the U.S. One formation recently receiving a great deal of attention is the Marcellus Shale formation beneath large portions of New York. In this paper‚ the New York area provides an overview of the Marcellus Shale formation‚ noting advantages‚ disadvantages and potential financial impacts of developing this energy source. Marcellus Shale is marine sedimentary rock in eastern North America. The shale has natural gas distributed throughout
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------------------------------------------------- Shale gas From Wikipedia‚ the free encyclopedia For gas generated by oil shale pyrolysis‚ see Oil shale gas. 48 Shale basins in 38 countries‚ as per the EIA Derrick and platform of drilling gas wells in Marcellus Shale (Pennsylvania‚ USA). Shale gas is natural gas formed from being trapped within shale formations.[1] Shale gas has become an increasingly important source of natural gas in the United States since the start of this century
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Chapter 2.0 Cell Structure and Functions Prokaryotic and Eukaryotic cell Cell are grouped into tissue Cell as a unit of life Prokaryotic and eukaryotic cells Structure and functions: cell membrane Microscopic and structures of organelles plant and animal cell Cell prokaryotic theory eukaryotic Plasma membrane Organeles - Nucleus - mitochondria Plant cell Animal cell - ruogh and smooth endoplasmic reticulum -Golgi body --ribosome --lysosome compare --chloroplast --centriole animal plant
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The Marcellus Shale formation is located in Pennsylvania‚ New York‚ Ohio and West Virginia. This land is very popular because of its tight‚ deep shale formations which have the potential to hold a lot of natural gas. The Marcellus Shale is large and covers a widespread amount of land area in the Northeastern United States. Researchers say that there is a potential for the Marcellus Shale formation to hold around 500 trillion cubic feet of natural gas in its shale deposits deep beneath the earth’s
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1.A) Two main forms of cells exist: eukaryotic cells and prokaryotic cells. Prokaryotic cells are smaller and do not have membrane-bound nucleus or membrane- bound organelles‚ but do have: plasma membrane‚ cytosol and cytoplasm‚ and ribosomes. Prokaryotes contain much less DNA than eukaryotes and have circular chromosomes. Eukaryotic cells have information processing organelles‚ such as the nucleus which houses most of the cell’s DNA‚ and ribosomes which use information from DNA to produce proteins
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Shale gas is natural gas formed from being trapped within shale formations. Shale gas has become an increasingly important source of natural gas in the United States over the past decade‚ and interest has spread to potential gas shale’s in the rest of the world. In 2000 shale gas provided only 1% of U.S. natural gas production; due to rising oil prices gas prices have also been affected by the rise therefore there was big demand for gas in the US which in 2010 it was over 20% and the U.S. government’s
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In prokaryotes‚ it’s easier to make DNA replication because of the lack of a nucleus‚ but to do DNA replication in a eukaryotic cell is more difficult. DNA of an eukaryotic cell is in chromatin form to fit into the small nucleus for the replication to occur‚ first the DNA should open. This is because it is harder for eukaryotes to carry out DNA synthesis. Replication of DNA in a prokaryote is different from a eukaryote. In a prokaryote they have a single origin where the replication process starts
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