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B1.7

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Mind Map on B1.7, created by janet_a_morgan on 08/29/2015.
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Mind Map by janet_a_morgan, updated more than 1 year ago
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Created by janet_a_morgan almost 11 years ago
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Resource summary

B1.7
  1. Theories of evolution
    1. It is believed life began on earth 3 billion years ago
      1. Lamarck's theory
        1. Inheritances or acquired charateristics
          1. Organisms adapt in their lifetime and pass their adaptations into their offspring.
            1. Fast/regular change
              1. Not many people believed this
              2. Darwin's theroy
                1. Natural selection
                  1. Change over a long time
                2. Accepting Darwin's ideas
                  1. Gradually accepted because:
                    1. People believed God made the earth and wanted to believe this
                      1. Other scientists weren't convinced
                        1. Little evidence
                        2. He didn't know about genes, these were discovered later
                          1. He had some examples such as finches
                          2. Natural selction
                            1. Individual organisms show large variation because there is differences in their genes
                              1. Organisms compete for:
                                1. Food
                                  1. Shelter
                                    1. Predators
                                      1. Mates
                                      2. The organisms best adapted to the environment will survive and breed
                                        1. Genes are passed onto offspring
                                          1. A changed or new gene is called a mutation
                                          2. Classification and evolution
                                            1. Classification helps us see how closely organisms are related
                                              1. Largest groups are called kingdoms. Largest kingdoms:
                                                1. Animal kingdom
                                                  1. Plant kingdom
                                                    1. contains microoragnisms
                                                    2. Smallest group is called a species
                                                      1. These organisms are very similar
                                                      2. Evolutionary trees can be drawn to she relationships
                                                        1. Ecological relationships tell us how species have evolved together in an environment
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