Over time‚ many theories have been developed concerning the way evolution was originated. One of these main theories was that Multicellular organisms originated slowly over the last billion years from unicellular organisms. Another main theory is that Multicellular organisms originated abruptly during the Cambrian (around 500 million years ago) explosion from unicellular organisms. While these two theories are very different from one another‚ many people support each of these ideas. However‚ I am
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11-02-18 Classify … Shmalsify Clean this mess up… Aristotle 384-322 B.C. Two category System Plants & Animals Levels of Classification Why classify organisms? Kingdom Phylum Class Order Family Genus Species Humans: • King • Animalia • Philip • Chordata • Came • Mammalia • Over • Primates • For • Hominidae • Great • Homo • Spaghetti • Sapiens 1 11-02-18 Why are the The
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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 prokaryotes have cell walls. A five-kingdom
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and water molds Dog Vomit Slime Mold Mushroom Plantlike Protists: Red‚ Brown‚ Green Algae Green Algae: Phylum Chlorophyta Unicellular green algae‚ Colonial (volvox)‚ Multicellular (ulva‚ sea lettuce) Spirogyra live in water‚ multicellular named after a spiral shaped chloroplast autotrophic Diatoms (Plantlike Protist) produce thin cell walls of silicon‚ main component of glass EUGLENA (Plant like Protist) Paramecium (Animal
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3 domains (higher level of classification that groups kingdoms) Bacteria Prokaryotic (single-celled; microscopic) Archaea Prokaryotic (single-celled; microscopic) Eukarya Eukaryotic Includes single-celled eukaryotes Splits the protists into several groups in the kingdom level Includes 3 kingdoms of multicellular eukaryotes Distinguished partly by their modes of nutrition Plantae Plants produce their own sugar and other foods through photosynthesis Fungi Absorbs dissolved nutrients
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is watery cytoplasm‚ and the chemical processes inside the cell occur within this watery medium. Upon microscopic examination‚ we see there are two basic types of cells‚ prokaryotic and eukaryotic‚ see the table below to see a comparison of the two cell types. Table 1. Comparison of Prokaryotic and Eukaryotic Cells | |
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(fungi‚ mosses‚ ferns‚ gymnosperms and angiosperms) were included under ‘Plants’. It is based on the presence of cell wall. But prokaryotes and eukaryotes are widely differed in other characteristics. It included the unicellular and the multicellular organisms in same group. E.g. Chlamydomonas and Spirogyra were placed under algae. It did not differentiate between the heterotrophic fungi and the autotrophic green plants. Fungi have chitinous cell wall while the green plants have cellulosic
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(a) State two processes which involve mitosis. ..................................................................................................................................... ..................................................................................................................................... .....................................................................................................................................
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lysosome. There are two types of main cells which include eukaryotic and prokaryotic cells. A eukaryotic cell is a human cell. A eukaryotic cell possesses a clearly defined nucleus and has a nuclear membrane that surrounds the nucleus in which the chromosomes are found. There is also another type of cell which is a called a prokaryotic cell‚ this cell lacks a membrane bound nucleus. The difference between these two cells is that Eukaryotic cells contain membrane-bound organelles‚ such as the nucleus
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or autotropic trophic refers to feeding‚ auto meaning self feeding‚ heterotrophic means‚ has to get its own food. uni- or multicellular Fungi all heterotrophic complete lack of flagella cell wall of chitin contains nitrogen‚ also in bugs plantae all autotrophic cell wall of cellulose all multicellular Animalia no cell walls all heterotrophic all multicellular Heterotrophic prokaryote cells plasma membrane = cell membrane made of lipid and protein controls what enters and leaves
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