Evolution by natural selection is slow but can be observed in certain situations. How to spot evolution in real time: Artificial selection – manipulation by humans such as breeding dogs or growing corn. Repro-rate – rate of reproduction. Stochastic Event: unexpected disaster like a volcano eruption or tornado. (Research geological time) LIVING THINGS: Biology – Study of living things. Living things – all the organisms descended from a single-celled ancestor. * Characteristics:
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separation‚ asexual reproduction and extinction of fossils Phylogeny Evolutionary relationships Can apply to every single species including extinct ones Uses DNA‚ therefore it is accurate Six Kingdoms Animalia Plantae Fungi Protista Archaea Bacteria Animalia All are multicellular and heterotrophs Most reproduce sexually Live in terrestrial and aquatic habitats Cell walls are absent Plantae All are multicellular and autotrophs Reproduce sexually and asexually Most are terrestrial
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throughout the organism’s life Reproduction: reproduce Biological Evolution: The change over time of living organisms 3 Domains and major characteristics and examples (Archaea‚ Bacteria‚ Eukarya) Bacteria: Most are unicellular and microscopic. Prokaryotic. Example: Salmonella‚ peptidoglycan makes up a cell wall type thing Archaea: Most are unicellular and microscopic. Prokaryotic. Example: ancient bacteria‚ live in harsh enviorments‚ Eukarya: Contain a nucleus and organelles. Eukaryotic. Example:
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Article on Natural environment Natural environment The natural environment encompasses all living and non-living things occurring naturally on Earth or some region thereof. It is an environment that encompasses the interaction of all living specie. The concept of the natural environment can be distinguished by components: Complete ecological units that function as natural systems without massive human intervention‚ including all vegetation‚ microorganisms‚ soil‚ rocks‚ atmosphere and natural phenomena
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Raudah P. Mangbisa Grade VIII-Nilo VIRUS A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms‚ from animals and plants to bacteria and archaea. Characteristics: Like living organisms‚ viruses contain nucleic acids and proteins. Inside living cells‚ viruses can reproduce‚ but not by the process of mitosis like most living cells. Viruses lack some characteristics of living organisms. Outside of living cells‚ viruses are
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Underwater Treasures: Titanic A major shift in our innovative world occurred during the beginning of the 20th century. Inventions that rule our era today were first brought upon in the early 1900s. One of the most notorious of these inventions was the steamboat. During this time there was a big transition from sailboat to steamboat. A significant change as to how naval vessels were built and operated took place‚ which sometimes resulted in conducting problems leading to tragedies. One of the most
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Biology LabPaq / Published by: Hands-On Labs‚ Inc. sales@HOLscience.com / www.HOLscience.com / Toll Free 866.206.0773 A laboratory Manual of Small-Scale Experiments for the independent Study of general Biology 50-0053-BK-02 LabPaq® is a registered trademark of Hands-On Labs‚ Inc. (HOL). The LabPaq referenced in this manual is produced by Hands-On Labs‚ Inc. which holds and reserves all copyrights on experiences. The laboratory manual included with a LabPaq is intended for the sole use
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fatal‚ were harmful for their growth. Nowadays‚ however‚ microorganisms can be found almost anywhere we can think of‚ independently of the conditions inherent to each of these places. It took billions of years of evolution to result in bacteria and archaea adapting to harsh conditions‚ such as extreme heat or Effect of Osmotic Stress and Temperature on Microbial Growth 2 hypertonicity‚ for example. During this long period of time‚ novel proteins were positively selected according to each environment
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C) 0.3 m to 100 m. D) 1 m to 100 m. E) 1 m to 300 m. 5. Cellular foundations Page: 4 Difficulty: 2 Ans: B Which group of single-celled micro-organisms has many members found growing in extreme environments? A) bacteria. B) archaea. C) eukaryotes. D) heterotrophs. E) none of the above. 6. Cellular foundations Page: 5 Difficulty: 2 Ans: B The bacterium E. coli requires simple organic molecules for growth and energy—it is therefore a: F) chemoautotroph. G) chemoheterotroph
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PLASTIDS Plastids are large cytoplasmic organelles. Plastids are major organelles found in the cells of plants and algae. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis‚ and the types of pigments present can change or determine the cell’s colour. The term plastid was derived from the Greek word plastikas meaning formed or moulded. This term was coined by Schimper in 1885. In plants
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