1 / 32

C ells

C ells. B uilding blocks of life Smallest living unit of organisms. Nutrition. Autotrophic make their own food eg photosynthesis Heterotrophic cannot manufacture food eg animals have to eat food. Atom. Molecule. Organelle. Cell. Tissue. Tissue. Organ. Organ.

drago
Download Presentation

C ells

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cells Building blocks of life Smallest living unit of organisms

  2. Nutrition Autotrophic • make their own food • eg photosynthesis Heterotrophic • cannot manufacture food • eg animals have to eat food

  3. Atom Molecule Organelle Cell Tissue Tissue Organ Organ Brainstorm some examples of each level with the person next to you – 3 minutes Organism Organism Organ system Organ system

  4. Diversity of organisms Prokaryotes Kingdom Fungi Kingdom Plantae Kingdom Monera Bacteria Kingdom Animalia Kingdom Protocista Eukaryotes Prokaryotic ancestor

  5. PROKARYOTES • bacteria • single primitive cell • no true nucleus • loop of DNA

  6. EUKARYOTES • eg plants & animals • unicellular or multicellular • true nucleus • chromosomes in pairs

  7. Protists Mostly unicellular Heterotrophic &/or autotrophic

  8. Fungus Plant-like (non-motile) but lack chlorophyll

  9. Plants • cell wall • large vacuole • chloroplasts (for photosynthesis)

  10. Animals • Several smaller vacuoles • No cell wall • No chloroplasts

  11. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

  12. ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

  13. MENU Quick Quiz Key Words Videos Exercise Additional slides History of the cell

  14. Key words Back to menu • Prokaryote • Eukaryote • DNA • chromatin • nucleus • membranes • membrane-bound organelles

  15. Quick quiz Back to menu • An ____ makes is an organism which makes its own food • A ____ has to obtain food from elsewhere (feeding) • ____ have no true nucleus (loose chromatin) • ____ have a true nucleus True / False? • Prokaryotes have membrane bound organelles • Prokaryotic cells are diploid • Eukaryotic cells have pairs of chromosomes • Homologous chromosomes in bacteria form chains • Prokaryotes are multi-cellular • Eukaryotes include fungi, plants and animals Answers

  16. Quick quiz Back to menu • An autotroph makes is an organism which makes its own food • A heterotroph has to obtain food from elsewhere (feeding) • Prokaryotes have no true nucleus (loose chromatin) • Eukaryotes have a true nucleus True / False? • Prokaryotes have membrane bound organelles F • Prokaryotic cells are diploid F • Eukaryotic cells have pairs of chromosomes T • Homologous chromosomes in bacteria form chains F • Prokaryotes are multi-cellular F • Eukaryotes include fungi, plants and animals T

  17. Videos Back to menu http://www.microbeworld.org/index.php?option=com_jlibrary&view=article&id=800 (youtube)

  18. Exercise Back to menu Draw, label and annotate a) a prokaryote cell b) a eukaryote cell READING Workbook p54

  19. Extension slides Back to menu • The remaining slides are for additional information only

  20. Bacteria (Kingdom Monera) Back to menu • Simple unicellular bacteria (eubacteria) • Cyanobacteria(blue-green algae). • Cell wall surrounded by slime layer • Flagellum for locomotion Chromosome is usually a simple DNA circle Haploid – no homologous pairs of chromosomes No membrane-bound organelles

  21. EUKARYOTES Back to menu • True nucleus • Chromosome is a double helix of DNA • Mitosis and meiosis occur • Diploid – homologous pairs of chromosomes (except in gametes) • Recessive genes may not be expressed

  22. MRS GREN Back to menu • Move • Respire (uses Oxygen) • Sensitive • Grow • Reproduce • Excrete wastes • Nutrition Cells show all the characteristics of life

  23. Basic Cell Theory Complete Back to menu • cell = basic unit of life • organism = one or more cells. • new cells from division of pre-existing cells.

  24. Every cell is just as alive as we are. Back to menu • cells work together to survive. • Humans ≈ 100 Trillion cells!!! • 50 cells would cover the dot on the letter “i” Wow!!

  25. A potted history of the cell Back to menu

  26. Robert Hooke 1665 Back to menu Plants and fungi are made of tiny boxes like honeycomb!

  27. Anton van Leuwenhoek 1673 Back to menu pond scum contains single-celled organisms, which I call animalcules

  28. Spontaneous Generation Back to menu 18th century Absolutely I agree Quite right Organisms generate spontaneously, like mice from dirty clothes/corn husks What about babies? + =

  29. Louis Pasteur 19th century Back to menu Non, non, non! I disagree Some sense at last

  30. Mid 19th Century Germany Back to menu All plants are made of cells All animals are made of cells

  31. 1858 Rudolf Virchow Back to menu Now we’re getting somewhere All cells arise from pre-existing cells

More Related