Triceratops and nest by Karen Carr. Genetic changes between generations either increase or decrease the chance of an organism's survival.
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| Overview version 1 |
| Life forms reproduce to make offspring. |
| The offspring differs from the parent in minor random ways. |
| If the differences are helpful, the offspring is more likely to survive and reproduce. |
| This means that more offspring in the next generation will have the helpful difference. |
| These differences accumulate resulting in changes within the population. |
| Over time, this process gradually leads to entirely new types of life. |
| This process is responsible for the many diverse life forms in the world today. |
