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Introduction to plant reproduction

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Introduction to plant reproduction

  1. 1. Introduction to Plant Reproduction: Sexual and Asexual Reproduction<br />8SCIENCE, Thurs. March 3rd<br />
  2. 2. What is reproduction?<br />Compare a human with a plant<br />We don’t have leaves or roots and a plants do not have a heart or brain<br />BUT we are alike in many ways<br />Plants and animals (and humans!) can make similar copies of ourselves<br /><ul><li>Called reproduction
  3. 3. Two types: asexual and sexual reproduction</li></li></ul><li>How plants reproduce: Sexual reproduction<br />Sexual reproduction in plants is similar to animal sexual reproduction:<br />Requires fertilization<br />Combine egg and sperm cells<br />Like in animals, egg cells are produced in female reproductive organ and sperm in the male reproductive organ<br />Meiosis creates these cells<br />
  4. 4. How plants reproduce: Sexual reproduction<br />Review: Meiosis produces 4 sex cells with half the number of chromosomes of original cell<br />Sex cells are also called GAMETES<br />Have HALF the number of chromosomes, called HAPLOID<br />Male/female reproductive organs can be on the SAME or SEPARATE plants<br />Most plants depend on animals for fertilization, to help get the egg and sperm cells together<br />Usually a SEED develops <br />In some plants a SPORE develops<br />
  5. 5. How plants reproduce: Asexual reproduction<br />Some plants do NOT produce seeds – Can you think of some fruits/vegetables that do not have seeds?<br />Seedless oranges, grapes<br />How do these plants reproduce?<br />ASEXUAL REPRODUCTION!<br />Most plant cells can grow into other types of cells, and a NEW plant may be produced from PART of the plant<br />
  6. 6. How plants reproduce: Asexual reproduction<br />Growers cut part of the plant and re-plant it somewhere else<br />It is genetically IDENTICAL to the original plant<br />Called DIPLOID because it has DOUBLE the number of chromosomes than in sex cells<br />People have been doing this for hundreds of years<br />

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