Plants Plants Fronds

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Plants Plants Fronds Powered By Docstoc
					Plants
                    Fronds
• Frond – leaf on a fern
            Spores on Frond
• Spores (the dots) are found on the underside
  of the frond. (Ferns don’t reproduce with
  seeds.)
                   Moss
• Moss doesn’t have roots. Instead they they
  have rhiziods.
                    Moss
• A clump of moss
Moss
Moss & Ferns
                   Seeds
• 3 main parts
  – 1.embryo
  – 2.food store
  – 3.seed coat
                   Seed Plants
•    Seed Plants share 2 characteristics
    1. Have vascular tissue
    2. Use pollen & seeds to reproduce




    Let’s look at some plants that reproduce by means
        of seeds….
Seed Plants
Seed Plants
Seeds…why aren’t these growing?
               Seeds grow…
• Seeds can’t grow until there is water.
                    Germination
      http://www.youtube.com/watch?v=iFCdAgeMGOA&feature=related


• Germination – when the embryo (young
  plant) “POPS” out of the seed.
    Roots have 3 main purposes
1. Anchor the plant in ground
    Roots have 3 main purposes
2. Absorb water & minerals from the ground
3. Sometimes it stores food
                 Root hairs
• Root hairs help the root in absorbing water
  and nutrients
                    Stems
• Provide support
• Contains vascular tissue
    Annual Rings on Stem of Tree
• Annual rings are made of xylem tissue and
  represent a year of growth
Annual rings in a stem of a tree
Leaf
       Leaf

What is the main
 purpose of the
      leaf?
To make FOOD in
   the process
    known as
PHOTOSYNTHESIS.
              Photosynthesis
 • Ok… the leaf needs certain ingredients for
   photosynthesis…. Think about the
   photosynthesis dance…

Carbon                       Glucose
dioxide + Water               sugar    +   oxygen
                              FOOD
• The leaf needs the gas carbon dioxide to make
  food and releases the gas oxygen as a waste.

• So… how does carbon dioxide get into the leaf
  and oxygen get out of the leaf?
STOMATA
Stomata
            Gymnosperms
• Gymnosperms produce “naked seeds” (LOL)…
  their seeds are NOT enclosed by a fruit.
          Gymnosperm
•Needle like leaves
•Reproductive structures called cones.
                Angiosperms

All angiosperms
produce seeds
enclosed in fruits.
      2 Types of Angiosperms
1. MONOCOT
        Monocot – one cotyledon
        one            seed leaf

         Petals are in threes

         Have parallel veins
             in leaf
        2 Types of Angiosperms
2. Dicots – have 2 seed leafs
           petals in 4’s or 5’s
           branching veins
                 Angiosperm
• Angiosperms have 3 different life spans.

  1. Annual – only live for 1 year
  2. Biennials – live for 2 years
  3. Perennials – live more than 2 years
• Annuals live for 1 growing season…. Have to
  replant every year. 
• Biennials live for 2 years. Once the flowers
  produce seeds, the plant dies. 
• Perennials live for more than 2 years and
  most flower every year.
Female Parts are left of bee   Male Parts are right of bee
The anther makes pollen
Flowers are colorful and smell to attract pollinators
such as bees, butterflies, bats, etc.
  Where does fruit come from???
• All angiosperms have fruit around their seeds
  for protection… so where does it develop?




                                 OVARY
                    Types of Fruit
• Fruits are classified as simple, aggregate, or multiple.
• Simple fruits develop from a single ovary. They include fleshy
  fruits such as cherries and peaches (drupe), pears and apples
  (pome), and tomatoes (berries).
• Although generally referred to as a vegetable, tomatoes
  technically are a fruit because they develop from a flower.
  Squash, cucumbers, and eggplants also develop from a single
  ovary and are classified botanically as fruits.
• Other types of simple fruit are dry. Their wall is either papery
  or leathery and hard, as opposed to the fleshy examples just
  mentioned. Examples are peanuts (legume), poppies
  (capsule), maples (samara), and walnuts (nut).

				
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posted:2/24/2012
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