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Plants
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General Characteristics
Eukaryotic Multicellular Perform photosynthesis Alternation of generations
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Alternation of Generations
One haploid generation One diploid generation
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Alternation of Generations
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Bryophytes Liverworts Hornworts Mosses
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Bryophytes Small plants that grow in moist places on land
Damp rocks, logs, forest floor, swamps, marshes, beside streams and pools Flagellated sperm cells Lack vascular tissues
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Tracheophytes Vascular plants Adapted to living on land
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Psilopsids
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Club Mosses
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Horsetails
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Ferns
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Seed Plants
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Tracheophytes Protective layer of cells around reproductive organs
Multicellular embryos Cuticles – waxy covering on outer cells Xylem
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Vascular Tissues Specialized tissues for transporting water and nutrients Xylem – transports water and minerals Phloem – transports water and food
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Xylem and Phloem
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Gymnosperms Cone-bearing plants Produce male and female cones
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Gymnosperms
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Angiosperms Flower-bearing plants
Seeds are contained in a protective wall that develops into a fruit
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Flowers
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Double-fertilization
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Parts of Plants
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Roots Anchor plant in soil or to object Absorb water and minerals
Store carbohydrates, water and other nutrients
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Root Structure
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Types of Roots
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Taproot A thick root that has smaller, side-branching roots, e.g. cassava, carrots, beets, parsnips and turnips Used for storage
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Tap roots
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Fibrous Roots Made up of many smaller branching roots
All about the same size and grow from a central point Do not grow as deeply, e.g. grass, strawberries, blueberries, scallions, marigolds and white clover
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Fibrous Roots
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Stems Provide support and attachment for roots, leaves, buds and flowers Allow growth in length and thickness Transport water and minerals from roots to leaves Transport carbohydrates from leaves to other parts
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Transport Roots and leaves are connected by vascular tissue: a system of internal tubes Water and nutrients are transported by two tissues: Xylem and Phloem
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Xylem and Phloem
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Xylem Made of non-living cells
Transports water and minerals from roots to leaves
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Phloem Consists of living cells
Transports nutrients such as carbohydrates to needed areas or to roots for storage
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Xylem and Phloem
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Types of Stems
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Rhizome An underground, horizontal stem that live through the winter, e.g. irises
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Tuber An enlarged portion of a rhizome, e.g. potato
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Bulb A shortened, compact, underground stem that is surrounded by fleshy leaves. E.g. onions, daffodils and tulips
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Tulip Bulb
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Stolons Also known as runners – aboveground stems, e.g. clover and strawberries
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Leaves Capture sunlight for photosynthesis
Regulate temperature via water evaporation Evaporation helps draw water up from roots
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Leaf structure
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Types of Leaves
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Simple vs compound
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Vein organization
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Leaf arrangements
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