- The first living things developed about 3.500 million years ago from molecules that could copy themselves.
- The molecules were produced in conditions on Earth at the time.
- Evolution occurs due to natural selection.
- If conditions on Earth had been different from what they were, natural selection could have produced very different results.
- There is variation between individuals of the same species.
- Individuals with certain characteristics have a better chance of surviving, and reproducing, if the environment changes or vital resources become scarce.
- There will be more individuals with these characteristics in the next generation and so on.
-Selective breeding involves making deliberate selections based on desirable charecteristics.
- New species have evolved over a very long period of time.
- A large change in the environment may cause an entire species to become extinct.
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