Grade 10 Science: Plants PDF

Plants WATCH THIS VIDEO FOR GRADE 10 SCIENCE https://www.youtube.com/watch?v=mLfR4clK Lvo Four types of plant tissue (1) MERISTEMATIC TISSUE Unspecialized tissue Rapidly dividing (mitosis) Found in roots and shoots Responsible for new plant growth up/out (shoots) and down (roots) (...

Plants WATCH THIS VIDEO FOR GRADE 10 SCIENCE https://www.youtube.com/watch?v=mLfR4clK Lvo Four types of plant tissue (1) MERISTEMATIC TISSUE Unspecialized tissue Rapidly dividing (mitosis) Found in roots and shoots Responsible for new plant growth up/out (shoots) and down (roots) (2) EPIDERMAL TISSUE (“Dermal”) Forms protective outer covering Allows for the exchange of materials and gases into and out of the plant (3) GROUND TISSUE Provides strength and support in stem Stores food (sugars) and H2O in roots Where photosynthesis occurs in leaves (4) VASCULAR TISSUE XYLEM- transports H2O up to leaves PHLOEM- transports sugars from leaves to other parts of plant Photosynthesis  PHOTOSYNTHESIS- plants use CO2 from the atmosphere to produce glucose and O2, occurs in chloroplasts of leaf ground tissue cells Plants need to exchange these gases (CO2/O2) with the environment They do this by opening and closing STOMATA (sing STOMATE) underneath the surface of their leaves  Stomata are able to open and close by the special functioning of GUARD CELLS: – Guard cells swell (open stomate) when H2O moves inward by osmosis – Guard cells shrink (closed stomata) when H2O moves outward by osmosis DIFFUSION- is the movement of particles from an area of high concentration to an area of low concentration OSMOSIS- is the movement of H2O particles from an area of high concentration to an area of low concentration  STOMATA: http://www.youtube.com/watch?v=cFX4JrsPa Us PLANTS PHOTOSYNTHESIS: http://www.youtube.com/watch?v=-P-IUyAjq Yc&feature=related HOMEWORK 1. What is the purpose of cell division in plants? 2. What are the main functions of the three plant tissue systems? 3. Compare the function of xylem and phloem. 4. Give some examples to show how specialized plant cells perform specific functions. 5. Explain why the movement of H2O in xylem is always upward. 6. Draw two labeled diagrams to show the opening and closing of a plant stomata. Include the following labels: stomata, swollen guard cell, shrunken guard cell.