_________________________ 4-6 Lab Topic 4: Microscopy 2. Fill in the following table: Compound Microscope Dissecting Microscope Types of Light Available Powers of Magnification Available Type of Glassware that Specimens are Contained in... Is a 3-Dimensional View Possible? 3. Why is it not possible to perform dissection under a compound microscope? The focus is too high and the stage is too small 4. Why would a compound microscope be useful to a: a) bacteriologist? They use these devices to identify
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limited technology‚ many people believed this theory as technological inventions like the light compound microscope‚ which showed life‚ were non-existent at the time. Evidently‚ in 1665‚ Robert Hooke‚ an English scientist‚ invented his own compound microscope and observed the cellular nature of the cork. The topic of cells was brought forth and from this moment‚ in 1674 Leeuwenhoek viewed microscope ’ animalcules’ and in 1838‚ Schleiden and Schwann produced the cell theory‚ stating that all living things
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Biology Unit 1 – Section 3.1.1 Microorganisms as Pathogens To be considered a pathogen it must: Gain entry Colonise the tissues Resist the defences Cause damage to the tissues Pathogens include bacteria‚ viruses and fungi How do microorganisms enter the body Many pathogens enter through the gas exchange system (including ones that cause flu and TB) Food and water can carry pathogens into the stomach and intestines via the mouth and into the digestive system (including
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Biodegradation of Deltamethrin from S1 Fungal Isolate Janice Dsouza‚ Surajvanshikumar Suvarna‚ Seekha Parida‚ Anudurga Gajendiran and Jayanthi Abraham VIT UNIVERSITY VELLORE Abstract: Microbial biodegradation is a promising approach for recovery of environmental sites contaminated with pesticides and an effective way to remove toxicants. Deltamethrin is the most commonly used pyrethroid in agricultural practices commonly used in different geographical parts of the world. It is detected in many environmental
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female ovum‚ which can be seen with the naked eye. Most cells are much smaller than this‚ and microscopes are required to see them. Ordinary light microscopes‚ such as those you may find in school or college laboratories‚ are quite good for seeing tissues and organs‚ but are not that useful for looking into the inside of an individual human cells. An electron microscope is a very powerful type of microscope that is needed to look inside cells‚ and is necessary to see the detail of cell contents. However
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INTRODUCTION TO BASIC RESEARCH – ‘Basic research’ is a term that is widely used but with little apparent consensus on what it actually means. The term basic research usually refers to study and research on pure science that is meant to increase our scientific knowledge base. This type of research is often purely theoretical with the intent of increasing our understanding of certain phenomena or behaviour but does not seek to solve or treat these problems. Most scientists believe that a basic
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built the first microscope (30x magnification); viewed slices of cork called cellula (little rooms). Antoni Van Leeuwenhoek - worked with glass huge improvement in quality of lenses nearly 300x magnification became possible first to observe: * single-celled organisms “animalcules” * protists from pond water * bacteria from his mouth – “father of microbiology” * blood cells * banded pattern in muscle cells * sperm from ... 1830s – Compound microscope - improved magnification
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UNIT 1 – What is Biology? What is biology? the study of living organisms‚ divided into many specialized fields that cover their morphology‚ physiology‚ anatomy‚ behavior‚ origin‚ and distribution. Biotic vs. abiotic factors Biotic- living factors i.e. plants‚ animals‚ fungi‚ bacteria‚ and protest Abiotic- nonliving factors that affect living organisms. Environmental factors: habitat & weather 7 Characteristics of living things (Bio 3 Book Ch. 1) Uni-cellular vs. Multi-cellular Uni-Cellular-
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the microscope. Since the rate of pulsation is easily seen and calculated it’s easy to test the effects of different chemicals on their cardiovascular system. Since it’s known that caffeine increases the blood pressure one might expect that the blackworms under the influence of caffeine will show a grater average of pulsation rate. II. Material and Methods Materials: • High concentrated caffeine • Plastic pipette • 4 blackworms • Microscope • Microscope slide
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This allows us to view cells outside of their environment to study how they work. In turn this has provided us with information about different viruses and how to create vaccines for these. 4. The Invention of the electron microscope occurred in 1931. The electron microscope is used to see molecular levels of the cell that cannot be seen by the naked eye. This has helped us drastically improve our understanding of cells. 5. The discovery of the mechanisms of light-independent reactions
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