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Some Questions

Some Questions. What name is given to plants that are vascular and have seeds and flowers? What type of plant does not have seeds by a vascular system?. Plants, Seeds and Flowers. Homework: Monocot/ Dicot Coloring Read pages 534 - 538. Flowers. Reproductive Organs of Angiosperms

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Some Questions

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  1. Some Questions What name is given to plants that are vascular and have seeds and flowers? What type of plant does not have seeds by a vascular system?

  2. Plants, Seeds and Flowers Homework: Monocot/Dicot Coloring Read pages 534 - 538

  3. Flowers • Reproductive Organs of Angiosperms • Attract insects, which help with pollination • Bright Colors • Nectar

  4. Stamen Pistil Stigma Anther Style Filament Ovary Petal Ovule Sepal Structure of a Flower • 1.Pistil: female reproductive structure • Stigma: sticky tip; traps pollen • Style: slender tube; transports pollen from stigma to ovary • Ovary: contains ovules;ovary develops into fruit • Ovule: contains egg cell which develops into a seed when fertilized

  5. Stamen Pistil Stigma Anther Style Filament Ovary Petal Ovule Sepal Structure of a Flower • Stamen: male reproductive structure • Filament: thin stalk; supports anther • Anther: knob-like structure; produces pollen • Pollen: contains microscopic cells that become sperm cells

  6. Stamen Pistil Stigma Anther Style Filament Ovary Petal Ovule Sepal Structure of a Flower Slide # 14 • Sepals: encloses & protects flower before it blooms • Petals: usually colorful & scented; attracts pollinators

  7. Parts of a Flower • Calyx: Consists of one or more sepals (Modified Leaves) which protect the flower while it is a bud • Corolla: Consists of the petals • Very colorful and fragrant

  8. Parts of a Flower, con’t • Androecium (Male Part): Produces the pollen grains • Consists of a Stamens (Consist of slender, threadlike filaments that are each topped by a pollen-containing sac called an anther

  9. Parts of a Flower, con’t • Gynoecium (Female Part): Houses the ovules • Consists of pistils which are in the center of a flower • Ovules develop in the ovary, a swollen lower portion of the flower

  10. Parts of the flower PISTIL • Stigma • Style • Ovary STAMEN • Anther • Filament becomes the fruit becomes the seed

  11. Seeds of Angiosperms Have a highly nutritious tissue called endosperm which originates when an egg is fertilized This tissue may transfer to the embryo by the time a seed matures Food is then stored in the embryo’s fleshy, leaflike cotyledons (Seed Leaves)

  12. Dicot vs. monocot seed • Dicot has two cotyledons (like bean) • Monocot has one cotyledons

  13. Monocot Plants Angiosperms have 1 seed leaf (cotyledon) Parallel veins on leaves 3 part symmetry for flowers Fibrous roots Example: lilies, onions, corn, grasses, wheat

  14. Dicot Plants Angiosperms that have 2 seed leaves (cotyledons) Net veins on leaves Flowers have 4-5 parts Taproots Examples: trees and ornamental flowers

  15. Are these monocot or dicot? How do you know?

  16. Some Questions What is the vascular system on a plant and how does it help plants? Give an example of a seedless plant that has a vascular system.

  17. Plant Structure Read pages 551 - 561

  18. Vascular Plant Body Vascular Tissue Systems make up the vasculary tissue plant body Dermal Tissue System: Ground Tissue System: Vascular Tissue System:

  19. Dermal Tissue Serves as a protective outer layer Covers all parts of a plants body Epidermis: Outer covering (skin) of a plant Only 1 cell thick

  20. Ground Tissue Performs photosynthesis, stores water and carbohydrates, assists in transport and supports conducting tissues Includes roots, stems and leaves Leaves: Cells are packed with chloroplasts and specialize in photosynthesis Stems and Roots: Cells function mainly for support of the plant body and a storage unit

  21. Vascular Tissue Moves water, nutrients, carbohydrates. Xylem: tissue that carries water and minerals upward from the roots Phloem: tissue that carries sugars made by photosynthesis from the leaves to where they will be stored or used

  22. Slide 2 A. Functions of Roots • Anchor & support plant in the ground • Absorb water & minerals • Hold soil in place Fibrous Roots Root Hairs

  23. B. Root Types Slide 3 Tap Root 1. Fibrous Roots: branching roots hold soil in place to prevent soil erosion Ex. Grasses 2. Tap Roots–larger central root reaches deep water sources underground Ex. Trees, Carrots, & Dandelions

  24. Stems • Nodes: Place where leaves attach to a stem • Internodes: Areas of a stem between nodes • Lateral Buds: Grows into the branches of a stem • Terminal Bud: Bud at the tip of the stem • Cortex: Outer layer of ground tissue • Pith: Inner layers of ground tissue

  25. Two Types of Stems Herbaceous Stems Woody Stems • Flexible, soft and green • Stiff, usually nongreen that contain layers of wood

  26. Slide # 6 A. Functions of Leaves • Main photosynthetic organ • Broad, flat surface increases surface area for light absorption • Have systems to prevent water loss • Stomata open in day but close at night or when hot to conserve water • waxy cuticle on surface • System of gas exchange • Allow CO2 in and O2 out of leaf Elephant Ear Plant

  27. B. Leaf Structures Slide # 7 Leaf Cross-Section Cuticle • Cuticle: waxy layer; covers upper surface • Protects leaf against water loss • Veins:transports water, nutrients and food • Made of xylem and phloem • Mesophyll: contains cells that perform photosynthesis b/c they contain Chloroplasts. Veins Mesophyll Stoma (Opening) GuardCells Surround each Stoma Stoma- singular Stomata-plural

  28. Slide # 8 More Plant Parts… • Guard cells: • cells that open and close the stoma • Stomata: openings in leaf’s surface; when open: • GAS EXCHANGE: Allows CO2 in & O2 out of leaf • TRANSPIRATION: Allows excess H2O out of leaf Guard Cells Stoma

  29. C. Plants find a use for Transpiration Slide # 11 • Transpiration: loss • of excess water from plant leaves • 2. Significance: • Transpiration causes enough pressure to help pull water (& required nutrients) up stem from roots. • As part of the water cycle, trees transpire water back into the atmosphere. • Transpiration provides much of the daily rain in rainforest. B A A average size maple tree can transpire 200 liters of water per hour during the summer. Transpiration is the #1 driving force for pulling water up stems from roots.

  30. Function of Stomata What goes out? O2 H2O What goes in? CO2 Slide # 9 • What process involves using CO2 andH2O releasing O2 as a waste product? • Photosynthesis • What is the plant using this process to make? • Carbohydrates-glucose • If the plant needs water for photosynthesis, why is water coming out of the stoma? Guard Cells Guard Cells Stoma Closed Stoma Open Stoma

  31. Function of Guard Cells Slide # 10 • These stomata (leaf openings) naturally allow water to evaporate out. • Why would the plant close stomata with guard cells? • Prevent excess water loss through transpiration. (conserve water) • So what is the point of having stomata? • Allow gas exchange for photosynthesis Guard Cells Guard Cells Stoma Closed Stoma Open

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