The circle of life seeds and germination

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The circle of life seeds and germination

  1. 1. T he Cir cle of Life(FOR PLANTS)14/02/13 K. Collins 2010 Middle School MCHS
  2. 2. Parts of the Seed The embryo: is the little ‘baby plant’ when conditions are favourable it develops into a new plant. Inside the seed it is made up of 3 different parts:1. Plumule- is like a leaf in its early development, the baby shoot.2. Radicle- It is the part that emerges first, it is the baby root, it develops into the main root3. Cotyledons – primary leaves &/or food storage 14/02/13 K. Collins 2010 Middle School MCHS
  3. 3. Seed Structure 14/02/13 K. Collins 2010 Middle School MCHS
  4. 4. Germination When the conditions are right, the seed bursts open and a new plant grows out. This process is called ‘GERMINATION’ When germination is complete, the embryo has become a young plant or seedling.14/02/13 K. Collins 2010 Middle School MCHS
  5. 5. What are the bestconditions forGermination?  There are 3 environmental conditions that are needed by all seeds before they germinate: 1. Water 2. Oxygen 3. Warm Temprature  Activity: Propose reasons why each condition is required for germination of seed to take place? 14/02/13 K. Collins 2010 Middle School MCHS
  6. 6. Ideal conditions forgermination1. Water: Is necessary for the seed to swell & burst open & then to transport food to the growing embryo2. Oxygen: helps provide the energy needed for growth & development3. Temperature: needed varies with the particular type of plant E.g. Banksia requires high temp. to burst the fruit so that the seeds may be released.4. Light not required for germination of most seeds, once the young shoot breaks through it is needed so the plant can make it’s own food. 14/02/13 K. Collins 2010 Middle School MCHS
  7. 7. Seeds & Germination14/02/13 K. Collins 2010 Middle School MCHS

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