“How the Earth was Formed” video notes: Theory: -sun was surrounded by a cloud of dust and gas -as cloud cooled little grains of minerals started forming -grains of minerals started bumping into each other (Problem was nobody could explain how these microscopic minerals formed a planet) Then in 2003 astronaut Don Pettit performed an experiment onboard the international space station. He put some salt in a plastic bag and found that almost immediately the grains started gathering together into little
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high salt/brine methanogens halophiles thermoacidophiles hot acidic springs 2. bacteria or eubacteria‚ more recent‚ very different biochemistry from archaea regular bacteria in soil‚ water‚ pathogens cyanobacteria Animal Plant Fungi Protist origins first to appear in the fossil record‚ not physically changed today most likely evolved from prokaryotes SIMILARITIES building blocks carbon compounds amino acids‚ nucleotides‚ fatty acids‚
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Phytoplankton From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Diatoms are one of the most common types of phytoplankton. Phytoplankton are the autotrophic component of the plankton community. The name comes from the Greek words φυτόν (phyton)‚ meaning "plant"‚ and πλαγκτός (planktos)‚ meaning "wanderer" or "drifter".[1] Most phytoplankton are too small to be individually seen with the unaided eye. However‚ when present in high enough numbers‚ they may appear as a green discoloration
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NITROGEN CYCLE IN SURFACE WATER BODIES by: yusra shamsudin 1.0 Nitrogen Nitrogen is very essential to all living matters especially to plant‚ animal and human. The source of nitrogen is from the atmosphere and it is exists as a molecule composed of two atom of nitrogen that is bonded together by triple bond. Figure 1: Nitrogen Source: anyone4science.blogspot.com 2.0 Nitrogen Cycle Nitrogen cycle is the transformation of nitrogen from one form to another. For living organism
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Phosphorus is the key nutrient that dictates algae growth and abundance. Microcystis‚ a species of cyanobacteria characterized by its blue colour continually contaminates the waters‚ and damages marine ecosystems‚ due to its toxicity. Being the smallest‚ shallowest and most densely surrounded lake in Canada‚ Lake Erie is easily impacted by surrounding impacts. Microcystis is a form of cyanobacteria‚ which is not a true form of algae but a more photosynthetic bacteria (Dalogul‚ 4). High levels of
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is a free floating aquatic fern‚ which nowadays can be found in freshwater environments in temperate and tropical regions all over the world. It ranks among the fastest growing plants on Earth and due to its association with the nitrogen fixing cyanobacteria Anabaena azollae‚ it is independent of extern organic nitrogen. In that way Azolla is not only known to fix huge amounts of carbon‚ but as well to produce vast amounts of organic nitrogen. The nutrient‚ which mainly limits the growth of Azolla
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Cell: The cell is the basic structural‚ functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing‚ and are often called the "building blocks of life". Discoverer: The cell was discovered by Robert Hooke in 1665. The cell theory‚ first developed in 1839 by Matthias Jakob Schleiden andTheodor Schwann‚ states that all organisms are composed of one or more cells‚ that all cells come from preexisting cells‚ that vital functions
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they rely on organic molecules as an energy source. The formation of autotrophic prokaryotic cells: The ozone layer began to form and due to this cells may have developed the pathway to make their own food (photosynthesis). There is evidence of cyanobacteria in stromalites. No membrane-bound nucleus or organelles. Eukaryotic Cells: DNA of these cells are organised into chromosomes within a membrane-bound nucleus‚ and they posses membrane-bound organelles such as mitochondria and chloroplasts. Colonial
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From ancient history to the present day the Earth and its living organisms have been evolving. Four billion years ago the Earth was home to life. Starting in the Archean Era to the most current era‚ which is the Cenozoic era in which humans live. One turning point of Earth’s history occurred when the Kotuikan Cliffs shifted towards the Artic Ocean. Also‚ when observing rocks paleontologists were able to see a stunning diversity in living organisms‚ this time period was known as the Cambrain
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DISCOVERY OF EARTH’S HISTORY: “FOSSILS” I.OBJECTIVES 1. WHAT IS FOSSILS? 2. HOW THEY WERE FORMED? 3. FOSSILIZATION PROCESSESS 4. FOSSILS RECORD 5. TYPES 6. PSEUDOFOSSILS 7. HISTORY OF THE STUDY OF FOSSILS 8. TRADING AND COLLECTING 9. IMAGE GALLERY II.DISCUSSION FOSSILIZATION PROCESSESS Permineralization Permineralization is a process of fossilization that occurs when an organism is buried. The empty spaces within an organism
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