1 / 26

The Importance of Cell Structure in Plant Growth and Function

Explore the relationship between the structure of onion cells and the overall size and shape of the plant. Learn how changes or damage to individual cells can impact the plant's structure and function. Understand why each individual cell is essential for the survival of the plant. Discover the history of cell theory and the impact of the microscope on biology.

olsen
Download Presentation

The Importance of Cell Structure in Plant Growth and Function

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. Does the structure of the onion’s cells determine its overall size and shape? Explain. If one cell were changed or damaged, would it affect the overall structure or function of the plant? If one cell is not important to the survival of the plant, why is each individual cell still important overall?

  2. A. CellTheory • The first microscope was developed in the late 1600s. Thinking question: How didthis change the study of BIOLOGY?

  3. 2. Closerstudy of the cell lead to the CELL THEORY, which has three parts: a. All organisms are made of one or more cells. -UNICELLULARor MULTICELLULAR

  4. b. Cells are the basic unit of structure/organization of all living things. Thinking question:What are the levels of organization? -Cells, Tissues, Organs, OrganSystems, Organism

  5. c. Cellscanonly arise frompreviouslyexistingcells. -UNICELLULARorganismsreproduce;MULTICELLULARorganismsreplace deadcells Cell Theory Vid

  6. B. MicroscopeTechnology 1. Different microscopes are designed to viewdifferentobjects. a. COMPOUND LIGHT MICROSCOPES use light to makesomethingappearlarger.

  7. -Theymagnify up to 1000 times their size, and are used to studythings at a CELLULARlevel.

  8. b. ELECTRON MICROSCOPESmagnifyobjects up to 500,000 times their size. -They are used to studyobjects at an atomiclevel.

  9. C. MicroscopeUse 1. The parts of a COMPOUND LIGHT MICROSCOPE: a. OBJECTIVE LENSES- Lenses that magnify objects at different powers.

  10. -There are three levels of magnification of objective lenses: -Low power – 4x -Medium power –10x -High power – 40x

  11. b. The EYEPIECEis the lens you look through. Its magnification is 10x. -Total magnification of an object is 10 x the amount of the objective lens. Ex: The 40x objective lens magnifies at 400 times an object’s size.

  12. c. The ARM attaches the lens to the bottom (for safe holding).

  13. d. Slides are clipped to the STAGE for examination.

  14. e. The DIAPHRAGM allows you to adjust the light coming through the stage. - More light is needed to view certain specimen.

  15. f. COARSE FOCUS (larger knob) moves the stage up/down very quickly. g. FINE FOCUS(smaller knob) focuses the image slowly and carefully.

  16. h. The LIGHTsource illuminates your slide. i. The BASE supports the instrument.

  17. Label the Microscope

  18. C. CellTypes 1. Everycell has a PLASMA MEMBRANE, a boundary that controlswhatenters and leaves the cell.

  19. a. Most cellscontainDNA, and can break down molecules to makeenergy.

  20. b. There are twokinds of cells, EUKARYOTIC and PROKARYOTIC cells. Thinking question: What is the difference between them?

  21. 2. EUKARYOTIC CELLS containORGANELLES, small structures that do special jobs. a. They have a NUCLEUS, an ORGANELLEwhichholds the DNA.

  22. b. Most EUKARYOTES are multicellularorganisms, thoughsome are single celled (ex: amoeba, paramecia, yeast).

  23. 3. PROKARYOTIC CELLS do not containORGANELLES. a. TheirDNAfloatsaroundinside the cellbecausethere is no NUCLEUS.

  24. b. All PROKARYOTES are simple, single-celledorganisms. Most bacteria are PROKARYOTES.

  25. https://www.youtube.com/watch?v=zZtcMBTQaS4 4. PROKARYOTIC CELLS are smallerthanEUKARYOTIC CELLS. Thinking question: Why?

  26. 5. ALL CELLS CONTAIN: • Plasma Membrane • Cytoplasm • Ribosomes • DNA Thinking question: Why?

More Related