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Microbiology – Big Ideas 1. Groups of microorganisms have common characteristics, and these characteristics enable them to interact with other organisms in the environment. 2. Microorganisms can have both positive and negative effects on the environment. 3. The technological use of microorganisms raises many ethical issues. What is Microbiology? • Micro = Small • Bio = Life • The study of small living things • So small the naked eye cannot see them and we need a microscope • (Microorganisms) …such as ? Illness and Microorganisms • Remember the last time you were sick or were suffering from an illness: 1. What was the illness? 2. What caused the illness? 3. Did you take medication? If so, what? 4. On a scale of 1 – 10, how much did it suck? 5. Dare I ask…how did you contract it? Microorganisms make us SICK! •Viruses •Bacteria • These are very small cells, smaller then humans cells These microorganisms are only around a “micron” (μm) big, or one millionth of a metre. Mr. Tammemagi’s Latest Illness • Strep Throat • Streptococcus bacteria If I’m not sick anymore, why am I still taking medication? Antibiotic Resistant Bacteria • “Super Bugs” are created when some bacteria cells are not killed by antibiotics • When these bacteria cells multiply, their offspring are all resistant to antibiotics. We are SWIMMING in bacteria Eukaryotic Cells Vs. Prokaryotic Cells All cells on the planet are either eukaryotic (“true nucleus”) or prokaryotic (“before nucleus”). prokaryotic cells DO NOT have a defined Nucleus, their genetic material floats freely around the cytoplasm of their cell. Prokaryotic Cells Also… • • • • Smaller less then 5 µm in diameter Less complex and advanced More primitive and simple Do not have Mitochondria, vacuoles or chloroplasts • Have only a single chromosome • Reproduce through “binary fission”