INTRO. TO PLANT REPRODUCTION

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CHAPTER 10

• INTRO. TO PLANT REPRODUCTION

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ASEXUAL

• Requires only 1 parent
• Creates exact duplicate of parent
• Can be grown from cuttings
• Plants can spread by stems traveling underground
  producing new plants

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SEXUAL

• Requires 2 parents
• Sperm fertilizes egg making a zygote
• Wind, animals and water move sperm to egg

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Reproductive organs

• Can be on same plant or different plants
• If on same plant can reproduce by itself - still
  exchange sex cells
• Separate male and female plants must exchange sex
  cells to form seed

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Plant life cycles

• Starts with fertilization, becomes mature plant
  to produce seeds, dies off
• Sex cells form by meiosis and are haploid
• Plants have a 2 stage lifecycle

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Stage 1-gametophyte stage

• Meiosis produces haploid sex cells called spores
• Spores divide to form plant structures or an
  entire new plant
• Some new cells reproduce and make more sex cells

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Stage 2-sporophyte stage

• Begins with fertilization of egg from stage 1 by
  sperm
• These cells formed are diploid (complete set of
  chromosomes)
• Some cells in these plants can make sex cells
  thru meiosis and the cycle begins again