The study of microorganisms is called microbiology‚ a subject that began with Antonie van Leeuwenhoek’s discovery of microorganisms in 1675‚ using a microscope of his own design. Microorganisms are very diverse and include all the bacteria and archaea and almost all the protozoa. They also include some members of the fungi‚ algae‚ and animals such as rotifers. Many macro animals and plants have juvenile stages which are also microorganisms. Some microbiologists also classify viruses as microorganisms
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forms a mesh-like layer outside the plasma membrane of bacteria (but not Archaea)‚ forming the cell wall. The sugar component consists of alternating residues of β-(1‚4) linked N-acetylglucosamine and N-acetylmuramic acid. Attached to the N-acetylmuramic acid is a peptide chain of three to five amino acids. The peptide chain can be cross-linked to the peptide chain of another strand forming the 3D mesh-like layer.[1] Some Archaea have a similar layer of pseudopeptidoglycan or pseudomurein‚ where the
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BACTERIA. CLASSIFICATION Bacteria are extremely small and some can be just seen with the naked human eye. They are much smaller than eukaryotic cells but are still very complex despite their size. .the cell is surrounded by a cell membrane that enclosees the bacteria cell. They are single celled organisms. Bacteria are prokaryotic cells and therefore do not have a nucleus and do not have a lot of organelles like: mitochondria‚ chloroplasts‚ and other organelles that are usually found in eukaryotic
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1. What are the major characteristics of each of the three domains of life? Why do some researchers believe that the Kingdom Protista should be split into more than one kingdom? In the early days of biology‚ all organisms were classified as either plants or animals. Single-celled eukaryotic organisms such as algae and Paramecium were assigned to one of the kingdoms according to whether they are photosynthetic or not. Fungi and prokaryotes were grouped with plants‚ because fungi are sedentary and
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Name _________________________________ ID number_________________ Date_________________ Invitation to Biology – small test 1 (due in class on Thu Sep 5th) This is a multiple choice test – please circle the letter corresponding to the most correct answer. 15 Qs. 1. The instructions in DNA are used to make a. carbohydrates b. lipids (fats) c. DNA d. energy e. proteins 2. The ability to maintain a constant internal environment is called a. metabolism
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is neither a consumer nor a decomposer would most likely be classified in _______ 1. Theory 2. Controlled experiment 3. falsifiable 4. deductive reasoning 5. hypothesis 6. inductive reasoning 7. scientific inquiry 8. Domains 9. bacteria 10. archaea 11. Eukarya 12. protists 13. Fungi 14. Plantae 15. Animalia 16. organ system 17. algae‚ bird ‚ earthworm 18. internal digestion of cellular garbage by a structure called a lysosome 19. eating food 20. all organisms share a common genetic code
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have no nucleus. They have mitochondria. They have an endoplasmic reticulum. Plant cells are one example. 5. Which of the following consist of prokaryotic cells Plants and animals Bacteria and archaea ~Plants‚ fungi‚ bacteria and archaea Plants‚ bacteria and archaea 6. The cells of a bee and an elephant are‚ on average‚ the same small size; an elephant just contains more cells. What is the main advantage of a small cell size? Small cells are less likely to burst than large
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Paramecium‚ Elodea‚ Daphnia‚ Euglena). Each of these organisms is apart of one of the six kingdoms‚ (Eubacteria‚ Archaebacteria‚ Fungi‚ Protista‚ Plantae‚ and Animalia) which are apart of three domains‚ (Archaea‚ Bacteria‚ and Eukarya). In this lab‚ however‚ none of the organisms observed were archaea or bacteria. Also‚ all the organisms were eukaryotes‚ not prokaryotes‚ which are organisms without a nucleus and a single chromosome (a double-stranded DNA located in an area of the cell) instead. In the
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photosynthetic. Animalia Archaea Plantae Fungi Question 7 of 20 Which kingdom of Eukarya consists primarily of unicellular organisms? Plantae Fungi Animalia Protista Question 8 of 20 A researcher collected archaea and protists from a thermal vent. How do the cells of these two organisms differ? Protist cells will contain organelles. Protist cells will contain DNA. Archaea cells will contain nuclei. Archaea cells will be larger.
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The five basic properties are: cellular organization‚ metabolism‚ homeostasis‚ growth and reproduction‚ and heredity. Biologists have assigned all living things to six groups called Kingdoms. The six kingdoms are Archaea‚ Bacteria‚ Protista‚ Fungi‚ Plantae‚ and Animalia. Archaea is the kingdom of prokaryotes; simple cells that don’t have nuclei; they include methanogen‚ which fabricates methane. Bacteria are second in the prokaryotes‚ they are typically a few micrometers in length and come
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