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Discover and Diversity of Cells

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  1. Discover and Diversity of Cells Fall 2005, Pflugerville ISD

  2. Discover and Diversity of Cells Robert Hooke first to describe the cell. In 1665, he built a microscope and looked at cork or bark cells. He looked at plants, feathers, fish scales, and fly eyes. Fall 2005, Pflugerville ISD Cite: http://www.mcrit.com/COMSOC/persones_tecniques/Robert_Hooke_archivos/Robert_Hooke.jpg

  3. Discover and Diversity of Cells Anton van Leeuwenhook- looked at protist under his own microscope. He looked at blood cells and was the first person to see bacteria. He discovered yeast is a single-celled organism. Fall 2005, Pflugerville ISD Cite: http://www.caribbeanedu.com/images/kewl/biomass01.gif

  4. Discover and Diversity of Cells All organisms are made of one or more cells. The cell is the basic unit of all living things. All cells come from existing cells. The Cell Theory States: Fall 2005, Pflugerville ISD

  5. Discover and Diversity of Cells A plant cell is easier to see than an animal cell because of the cell wall. Fall 2005, Pflugerville ISD

  6. Discover and Diversity of Cells Types of Cells: Eukayotic – are the largest cells. These cells have a nucleus and membrane-bound organelles. Prokaryotic – cells with no nucleus. Fall 2005, Pflugerville ISD

  7. The Organization of Living Things An organism that is singled celled is called unicellular. Bacteria Fall 2005, Pflugerville ISD Cite: http://www.aradio.co.uk/caption/bacteria.jpg

  8. Asexual is a single parent produces offspring that are exactly like the parent. Most single-celled organisms are asexual. Sexual are two parents produce an offspring that is not exactly like the parents. Sex cells combine and get half of its genes from the mother and half from the father. Inheritance Fall 2005, Pflugerville ISD

  9. Life in the Environment Spring 2006 Pflugerville ISD

  10. Life in the Environment • Autotroph – organisms that make their own food. (Examples are plants, algae, and some bacteria) • Heterotroph – organisms that must get their food from other organisms by eating or absorbing the nutrition. (Examples are animals, fungi, protozoa, slime molds, and some bacteria.) Fall 2005, Pflugerville ISD

  11. Life in the Environment The environmentis everything that affects an organism. Examples: animals, weather, & plants. Ecology is the study of the relationships between organisms and their environment. Spring 2006 Pflugerville ISD Cite: http://www.wappingersschools.org/RCK/staff/teacherhp/johnson/visualvocab/ecology%5b1%5d.jpg

  12. Life in the Environment Two parts to the environment: Biotic (Living): Trees, plants & animals Abiotic (Nonliving): water, sunlight, air and rocks. Spring 2006 Pflugerville ISD Cite: http://plato.acadiau.ca/courses/idst/matthews/Images/Ecology/Ecology%202.jpg

  13. Life in the Environment Cite: http://www.nashvillezoo.org/komodo.jpg Five Levels of the Environment: Anything that can live on its own is an organism. Population- group of same organism Organism Population Spring 2006 Pflugerville ISD Cite: http://photophoto.pwp.blueyonder.co.uk/images/indonesia/Komododragons.jpg

  14. Life in the Environment Community: different populations in same area. Ecosystem: community with nonliving environment. Biosphere: allecosystems on Earth. Community Ecosystem Spring 2006 Pflugerville ISD

  15. Classifying Organisms into Domains and Kingdoms Fall 2005, Pflugerville ISD

  16. Classifying Organisms into Domains and Kingdoms Archaebacteria- are not as common as eubacteria. These cells are single-celled organisms. They have circular DNA and they lack a nucleus and membrane-bound organelles. Eubacteria- are the most common type of cells. They live everywhere. They don’t have a nucleus and they don’t have membrane-bound organelles. Fall 2005, Pflugerville ISD

  17. Classifying Organisms into Domains and Kingdoms Protista-kingdom that includes all single-celled eukaryotic organisms. Fungi – kingdom that includes heterotrophic organisms. Plantae- kingdom that includes multicellular autotrophic organisms. Animalia-kingdom that contains multicellular heterotrophic organisms. Fall 2005, Pflugerville ISD