7 th  Grade Chapter 2 Lesson 1 Pgs. 31-34 For Student Use Only
Plants <ul><li>The Purpose and Design of Flowers </li></ul><ul><ul><li>Plants are extremely important! </li></ul></ul><ul>...
Plants <ul><li>Christian Konrad Sprengal- important botanist </li></ul><ul><ul><li>He found that </li></ul></ul><ul><ul><u...
Plants <ul><li>Sprengal </li></ul><ul><ul><li>His work was neglected for a long time but is now accepted by botanists arou...
Plants <ul><li>Sprengel </li></ul><ul><ul><li>He also discovered that although plants have both pistils and stamens, they ...
Plants <ul><li>Sprengel </li></ul><ul><ul><li>He also made the distinction from wind- pollinated plants and insect-pollina...
Plants <ul><li>All flowers look different but have the same structure and purpose. </li></ul><ul><li>All flowers have gene...
Plants <ul><li>Flower Parts: </li></ul><ul><ul><li>Pistil- vase shaped structure of a flower that holds the ovary and ovul...
Plants <ul><li>Flower Parts: </li></ul><ul><ul><li>Stamen- surround the pistil and produce pollen </li></ul></ul><ul><ul><...
Plants <ul><li>Flower Parts: </li></ul><ul><ul><li>Petals- Attract insects for pollination </li></ul></ul><ul><ul><li>Sepa...
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7th Grade Chapter 2 Lesson 1

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7th Grade Chapter 2 Lesson 1

  1. 1. 7 th Grade Chapter 2 Lesson 1 Pgs. 31-34 For Student Use Only
  2. 2. Plants <ul><li>The Purpose and Design of Flowers </li></ul><ul><ul><li>Plants are extremely important! </li></ul></ul><ul><ul><ul><li>They turn solar energy into food for themselves, animals, and people </li></ul></ul></ul><ul><ul><li>Biology is the study of living things and the study of plants is called botany. </li></ul></ul><ul><ul><li>Botanists study plants </li></ul></ul>
  3. 3. Plants <ul><li>Christian Konrad Sprengal- important botanist </li></ul><ul><ul><li>He found that </li></ul></ul><ul><ul><ul><li>All flowers and all parts of a flower were designed for a purpose </li></ul></ul></ul><ul><ul><ul><li>Flowers are organs of plant reproduction </li></ul></ul></ul><ul><ul><ul><li>Insects are important to help pollinate flowers (carrying the pollen from the stamen of one flower to the pistil of another). </li></ul></ul></ul>
  4. 4. Plants <ul><li>Sprengal </li></ul><ul><ul><li>His work was neglected for a long time but is now accepted by botanists around the world </li></ul></ul><ul><ul><li>He discovered through OBSERVATION and EXPERIMENTATION that each flower’s nectar-producing organs have certain colors to attract certain insects. </li></ul></ul>
  5. 5. Plants <ul><li>Sprengel </li></ul><ul><ul><li>He also discovered that although plants have both pistils and stamens, they develop at different times </li></ul></ul><ul><ul><li>This difference in development requires cross-fertilization of flowers </li></ul></ul><ul><ul><li>Cross-fertilization - when one flower pollinates another. </li></ul></ul>
  6. 6. Plants <ul><li>Sprengel </li></ul><ul><ul><li>He also made the distinction from wind- pollinated plants and insect-pollinated plants. </li></ul></ul>
  7. 7. Plants <ul><li>All flowers look different but have the same structure and purpose. </li></ul><ul><li>All flowers have generally similiar design, the same parts, and function </li></ul>
  8. 8. Plants <ul><li>Flower Parts: </li></ul><ul><ul><li>Pistil- vase shaped structure of a flower that holds the ovary and ovule </li></ul></ul><ul><ul><li>Stigma- top of the vase </li></ul></ul><ul><ul><li>Style-curved in middle </li></ul></ul><ul><ul><li>Ovary- round bottom that holds ovule </li></ul></ul><ul><ul><ul><li>Ovule- potential seeds </li></ul></ul></ul>
  9. 9. Plants <ul><li>Flower Parts: </li></ul><ul><ul><li>Stamen- surround the pistil and produce pollen </li></ul></ul><ul><ul><li>Anther- produces pollen grains </li></ul></ul><ul><ul><li>Filament- holds up anther </li></ul></ul><ul><ul><ul><li>Not all plants have both pistil and stamen </li></ul></ul></ul><ul><ul><ul><li>Stamen only- staminate </li></ul></ul></ul><ul><ul><ul><li>Pistil only- pistillate </li></ul></ul></ul>
  10. 10. Plants <ul><li>Flower Parts: </li></ul><ul><ul><li>Petals- Attract insects for pollination </li></ul></ul><ul><ul><li>Sepals- leaves that surround the bud </li></ul></ul><ul><ul><li>Bud- the developing flower </li></ul></ul><ul><ul><li>Receptacle- the enlarged portion of the stem. </li></ul></ul>

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