The Earliest Microscopes and Pond Ecology Essay

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The earliest microscope magnified the object ten times the actual size. They were made up of a tube with a plate for the object at one end and, at the other, a lens which magnified the object. In 1609, Galileo worked with the lenses and made more advanced instrument with a focusing device. Anton van Leeuwenhoek taught himself methods of polishing tiny lenses of extreme curvature which gave best magnification of that time up to 270 diameters. This led to the building of his microscopes and his discoveries. He was also the first to see and explain yeast plants, bacteria, life in a drop of water, and the circulation of blood corpuscles in capillaries. In his life, he used his microscope to make lots of discover on living and nonliving …show more content…

Fine adjustment knob is mainly used to bring slide in focus on high power and coarse is used move stage up and down. The revolving nose piece holds two or more objective lenses with different objective power. Many microscopes have Diaphragm or Iris control the intensity and size of light. All these parts in microscope help observe the specimen. Pond Ecology is the interaction of life in pond with environment. Pond have low oxygen levels, little animal life, and lack of food supply. A pond contains mostly water, few nutrients, and less aquatic life. Organisms live, grow, and die in the pond. The remains decay in pond and are released back to keep the cycle going. The aquatic organism take four organism carbon, oxygen, nitrogen, and phosphorus to be made. In winter, the organism in pond are amphibians meaning their body temperature falls as the water temperature drops decreasing the organism respiration rate and energy needed. Pond organism such as turtles and frog bury themselves in mud at bottom of sea and hibernate. To conclude, pond have a life cycle they go through (intext cite) Rotifers are microscopic aquatic animals of the phylum Rotifera. They live in pond water and in moist soil. They can also be found in lake bottoms, mosses and lichens growing on tree trunks and rocks. They are not visible by naked eye and have mostly soft bodies. Only hard parts they have are jaws that can be preserved in fossil record. Rotifers are multi -cellular

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