3/26 • Get out Plant Book and station lab • Yes, I do have your tests graded. I will give you your grade later today. • Draw a picture on your plant book • Test correction times: • Today after school • Tomorrow: before school, enrichment • Friday before school and after school * • *If you plan on coming in after school Friday, talk to me about this first!!
3/27 • Take out your plant booklets • Test correction times: • Tomorrow: before school and after school * • *If you plan on coming in after school tomorrow, talk to me about this first!!
Floweringplants Cone-bearingplants Ferns andtheir relatives Flowers; SeedsEnclosed in Fruit Mosses andtheirrelatives Seeds Water-Conducting(Vascular)Tissue Greenalgaeancestor Evolutionary Relationships of Plants Where did plants come from? Why are they so different? How have they changed over time? Angiosperms Gymnosperms Ferns Bryophytes
Chapter 23: Plant Structures What are the 3 main organs and their functions: • Roots- absorb water and nutrients • Leaves– site of photosynthesis & gas exchange (O2 and CO2) • Stems- support; connect root + leaves; carry H2O + nutrients
Plant Tissues • Dermal: outer covering of plant • cuticle: thick waxy covering, conserves H20 • root hairs: small cells on roots, increase surface area for water absorption
Plant Tissues 2. Vascular: transport system used to move water and nutrients throughout the plant. • xylem: transports water • phloem: transports nutrients and products of photosynthesis
Plant Tissues 3. Ground: composed of cells that lie between the dermal and vascular tissue.
Structures : ROOTS • Used for: • 1) Absorption of minerals and waterfrom the soil. • 2) Storage of starches (vegetables) • 3) Anchor to ground • 4) 2 main types of roots: • taproot—grow long and deep to reach water below the surface. • Ex. Carrots, radishes
Structures: ROOTS • fibrous—branched root system that grows close to the surface helps prevent soil from being washed away by rain. *Plants can have taproots, fibrous roots or both* • Apical Meristem: area of root where cell division and growth occurs.
Structures: STEMS: • Function: produce leaves, branches, and flowers; used for support and transport of substances between leaves and roots. Note: Wood = layers of xylem found in the stem. The tree rings show years of growth or “tree age”. Bark = composed of several layers including phloem.
Structures: Leaves • Function: Absorb light and carry out photosynthesis • Special structures • Stomata—opening in leaf to allow exchange of O2, CO2 and water vapor • Guard cell —regulatesopeningof the stomata and respond to conditions in the environment (wind, temperature) to maintain homeostasis within leaf.
Photosynthesis Equation: CO2+H2OC6H12O6+ O2 • Xylem: transports water needed for reaction to occur. • Phloem: transports glucose from leaves to roots for storage. • Stomata & Guard Cells: regulates the amount of gases & H2O needed for photosynthesis to occur. • Leaf: contains chloroplasts, chlorophyll, + enzymes needed for photosynthesis Light Energy PLEASE MAKE ADJUSTMENT IN PLANT BOOK FORMAT
Transpiration 2)Transpiration • lossofwaterthroughstomata • When water is abundant,itflowsfrom roots to leaves and guard cells respond by openingstomata to release excesswater • When water is scarce, guard cells respond by closing stomata to limit transpiration • High transpiration rates can lead to wilting. http://youtu.be/mc9gUm1mMzc
Monocot vs. Dicot • Monocot: 1 seed leaf; parallel veins; flower multiples of 3, Fibrous roots • Dicot: 2 seed leaves; branched veins; flower multiples of 4 or 5, tap root
3/28 • Bring Plant station packet up for a stamp • Fern and Moss Lab: • Stack textbooks on the outside edges of desks • Pick up paper from back • Read through the procedures for today’s lab • Test corrections: today after school in Gym 2 • Let me know NOW if you plan to do this!!!!
4-1 • Plant Dissection Lab – pick up paper from back • Take out warm up sheet for today’s warm up • Turn in: Fern/Moss Lab • If you missed Fern/Moss Lab: Make-Up today after school and Thursday during enrichment • Remember: Plant Quiz on Thursday!!! • Plant Test has been moved to Wednesday 4/9!!
Warm up • Using the picture to the right explain the steps of thetranspiration process.
Add the following • Next to transpiration in your plant book: • Turgor pressure is the pressure of a plant cell’s contents against the cell wall. This gives the plant its rigid structure.
4/2 Lab make ups tomorrow during enrichment!!! • Turn in: Flower Dissection Sheet • Pick up the papers from the back • Take out plant book and warm up sheet • Plant Quiz tomorrow!!! Plant Test Wednesday 4/9 • Warm Up: • What are the names of the plant groups and how do we differentiate them from one another? • What purpose do the phloem serve in photosynthesis?
Tropism • Tropism is a plant’s response to external stimuli. These movements are caused by a change in the plant’s growth pattern. Tropisms can be negative (moving away from the stimulus) or positive (moving towards the stimulus). Gravitropism Phototropism Thigmotropism Negative!
Plant System Interactions Interactions for Transport: • Root system absorbs water and minerals for photosynthesis • Ground tissue produces glucose by photosynthesis • Vascular tissue transports materials throughout the plant • *Both tissues produce hormones
Interactions for Reproduction: • Plant hormones control process of pollination and fruit ripening • Hormones that control flower development transported by vascular tissue • Developing seeds receive nutrients and water from vascular system
Interactions for Tropisms (Response): • Responses are controlled by hormones transported by vascular tissue
4/3 • Bring your plant book up for stamps • Key for the plant book is online!!! Check your book for HW tonight! • Lab make ups today during enrichment and tomorrow before school • Take out plant book and warm up sheet • Plant Quiz today!!! Plant Test Wednesday 4/9 • Warm Up: • Name one way that plants have adapted to grow on other plants.
PlantSystem Interactions: What do the transport, reproductive, and plant response systems of plants have in common? Vascular Tissue: XYLEM & PHLOEM