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Anthophyta - dicots - Meagan

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					                                                 Anthophyta – Dicots


Classification:
          Domain: Eukaryota
          Kingdom: Plantae
          Division: Anthophy ta
          Class: Dicotyledonae
Fact Bits:

    They make up the majority of anthophyta(also referred to as
         angiosper ms), the division of flowering plants

    170,000 species (Includes most shrubs and non-coniferous trees)
    The name D icots comes from the presence of two tiny seed leaves
         (cotyledons) in the plant embryo

    During germination, the cotyledons use their enzymes to digest food
         they have stored, beginning initial plant growth

    They are vascular plants and seed plants
                                                                                           Helianthus annuus, or,
                                                                                  the sunflower – a common dicot
Distinctive Features:

    In leaves, main veins are usually branched
    In stems, vascular tissues arranged in a ring
    Flowers, the petals and other structures arranged in patterns of 4 or 5
    Usually contain a taproot ( single large root that grows deep down beneath the plant, off of which grow shor t
         root branches)
Life Cycle:

    Similar to those of monocots (other class of angiosper ms)
    First organ to develop is embryonic root, soon followed by embryonic shoot(beginning of above ground plant)
    For first time breaking through soil, hook for ms at end of embryonic shoot to protect the tip by holding it
         downward as it grows up through soil

    This prevents breakage of delicate tip
                                             Table: Monocots vs. Dicots

                                                        Monocots                                 Dicots
             Examples                          Chives, corn, palm, pineapple                 Peanuts, spinach
          Pollen Structure                                 Single pored                         Three pored
            Flower Parts                             Multiples of three                      Multiples of 4 or 5
             Leaf Veins                              Parallel- ladder like                  Reticulated-net like
       Vascular Arrangement                          Bundles scattered                Arranged in a ring in the cor tex
         Secondary Growth                                    Absent                               Present
         Root Development                        Adventitious with taproot         Develops from radical w/ fibrous root
       Number of Cotyledons                                   One                                   Two
                                         Diagram: Life Cycle of Dicot




Resources:


    http://www.sidwell.edu/us/science/vlb5/Labs/Classification_Lab/Eukarya/Plantae/Anthophyta/D icotyledonae/
    http://en.wikipedia.org/wiki/Dicotyledon

				
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