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Topic: Plants

Topic: Plants. Objectives: . 1. Describe the current classification of land plants 2. Outline the life cycle of moss and ferns 3. Contrast gymnosperms and angiosperms/monocots and dicots 4. Discuss the function of several types of plant tissue. Text Reference. Chapters 22, 23, 24.

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Topic: Plants

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  1. Topic: Plants

  2. Objectives: 1. Describe the current classification of land plants 2. Outline the life cycle of moss and ferns 3. Contrast gymnosperms and angiosperms/monocots and dicots 4. Discuss the function of several types of plant tissue

  3. Text Reference Chapters 22, 23, 24

  4. Classification

  5. Kingdom Plantae multicellular, eukaryotic, non-motile, contain chlorophyll a + b, cell walls of cellulose, reproduce sexually

  6. Phylum Bryophyta Lack vascular tissue Gametophyte dominant. Live in moist areas. Reproduction dependent on water. Moss, liverworts

  7. Phylum Tracheophyta Contain xylem and phloem Sporophyte dominant Most common plants.

  8. Subphylum Pteropsida Ferns. Reproduction dependent on water.

  9. Subphylum Spermopsida Seed plants.

  10. (Gymnosperms – naked seeds.) Class Coniferae – seeds in cones. Needle-like leaves.

  11. Class Angiospermae Flowering plants. Seeds develop in ovaries.

  12. Subclass – Monocotyledonae Embryo with a single cotyledon leaves parallel flower parts in threes Grasses, palm

  13. Subclass – Dicotylendonae Embryo with two cotyledons Netted veination Flower parts in 4 or 5

  14. Life cycles of moss and ferns

  15. Protonema(young gametophyte)(N) Spores(N) Malegametophyte Femalegametophyte Maturesporophyte(2N) Capsule(sporangium) Antheridia Sperm(N) Archegonia Gametophyte(N) Youngsporophyte(2N) Zygote(2N) Sperm(N) Gametophyte(N) Egg(N) Figure 22–11  The Life Cycle of a Moss Haploid (N) Diploid (2N) MEIOSIS FERTILIZATION

  16. Figure 22–17  The Life Cycle of a Fern MEIOSIS Sporangium(2N) Haploid gametophyte (N) Diploid sporophyte (2N) Frond Younggametophyte(N) Spores(N) Maturesporophyte(2N) Developingsporophyte(2N) Maturegametophyte(N) Antheridium Sperm Gametophyte(N) Egg Sporophyteembryo(2N) Archegonium FERTILIZATION

  17. The Spermopsida A.   Overview. Designed for life on land B.   Adaptations

  18.   Roots absorb nutrients and water, hold plant upright,

  19. Stems Hold leaves up to sunlight Transport water and nutrients

  20. Leaves Perform photosynthesis

  21. Vascular tissue Transport materials Xylem- transports water and nutrients toward the leaves. Phloem- transports the products of photosynthesis around the plant

  22.   Reproductionadapted for life on “dry” land Pollen – contains sperm Seeds- contains embryo Fig. 22-5 p. 470

  23.    Gymnosperms “Naked” seeds Example Conifers

  24.    Angiosperms Flowering plants Egg is protected in an ovary. Ripe ovary is a fruit 1.   Monocots- Fig 22-12 p. 475 2.   Dicots- Fig 22-12 p. 475

  25. A square watermelon.

  26. Plant Tissue

  27. Meristematic tissue Produces new cells by mitosis. Undifferentiated.

  28. 1.   Apical meristem – at the tip of a growing stem or root 2.   Cambium – allows stems and roots to grow thicker Vascular cambium Cork cambium Pericycle Meristematic tissue

  29.    Epidermal tissue Provides protection Cork(bark) – keeps water out Epidermis – lets water in

  30.    Parenchyma Thin walled cells Store things Some contain chloroplasts Some store starch

  31.    Sclerenchyma Thick walled cells Support the plant

  32.     Vascular tissue Internal transport

  33.    Xylem Made of tracheids Long narrow cells with openings at each end Fig 23-6 p. 493

  34.    Vessel elements Much larger than tracheids Transport water.

  35.   Phloem Transports plant products Fig. 23-7 p. 493 Sieve tube elements- allow the passage of materials Companion cells - control activity of the sieve tube

  36. You are thinking……… Mr. Barnes……………. May we please, please, please, please, please, please, please, please, please, please, please, please, please, please, please, please,please, please Have a ……………….. Fun Review Activity!!!!!!!!!! I know what you are thinking.

  37. Moss Fern Flowering plant Label haploid (gametophyte) and diploid (sporophyte) phases Diagram the life cycle of

  38. Have a great day!

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