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  • Difference Between Prokaryotic And Eukaryotic Cells
    1,115 words
    Cells and Cell Theory What advantages does small size give to a cell? Many cellular processes occur by diffusion, which is efficient over short distances, but less efficient over long distances. Since all materials going in and out of a cell must pass through the plasma membrane, the greater the surface area of this membrane, the faster a given quantity of molecules can pass through. Smaller cells have a much greater surface-to-volume ratio than larger cells and therefore can 'feed' all areas of...
  • Prokaryote Cell
    686 words
    The Life of Prokaryotic Cells For the prokaryotes, life arose on earth about four billion years ago; they are the original inhabitants of this planet. For approximately two billion years, they were the only form of life on earth. They have since then continued to adapt and flourish on an evolving earth. They are by far the simplest of cells and were the first to evolve. Out of all organisms, prokaryotes are the smallest and least complex cells. They are too small to be seen except with the aid o...
  • Symbiotic Associations Of Prokaryotic Cells
    500 words
    Changes in the Atmosphere Causing Multicellularity About 2.5 billion years ago, oxygen began slowly to accumulate in the atmosphere, as a result of the photosynthetic activity of the. Those prokaryotes that were able to use oxygen in ATP production gained a strong advantage, and so they began to prosper and increase. Some of these cells may have evolved into modern forms of aerobic bacteria. Other cells may have with larger cells and evolved into mitochondria. As the amount of oxygen and other a...
  • Eukaryotic Cells
    1,087 words
    Scientists have formulated many theories about the origin of life and how it evolved into the various forms known today. These ideas come from the evidence of the fossil record, from laboratory simulations of conditions on the earth, and from consideration of the structure and function of cells. The earth was created more than 4 billion years ago, although more than 2 billion years probably passed before life was developed. Scientists believe that the atmosphere of the young earth was mostly wat...
  • Common Name Of Blue Green Algae
    1,053 words
    Cyanobacteria is any of a large, heterogeneous group of prokaryotic, principally photosynthetic organisms. Cyanobacteria resemble the eukaryotic algae in many ways, including morphological characteristics and ecological niches, and were at one time treated as algae, hence the common name of blue-green algae. Algae have since been reclassified as protists, and the prokaryotic nature of the blue-green algae has caused them to be classified with bacteria in the prokaryotic kingdom Monera. Like all ...
  • Inner Membranes Of Chloroplasts And Mitochondria
    1,327 words
    Origins of mitochondria and chloroplast Both mitochondria and chloroplast have an inner and outer membrane, each a phospholipid bilayer with a unique collection of embedded proteins. The inner membrane of the mitochondria is convoluted, with infolding's called crista e which gives it a greater surface are to enhance productivity of cellular respiration, it also encloses the mitochondrial matrix, and contains built in enzymes that make ATP. The inner membrane of the chloroplast encloses the gran ...

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