Natural Selection & Adaption
Types of Natural Selection
Natural selection is a process that makes it easier for a species to survive and produce offspring by adapting special traits ranging from beaks, body size, colour to blood type. These are passed down from parent to offspring by phenotypes (genes) which is the biggest cause of evolution change. For example a moths body colour can change depending on what colour their environment is to be hidden from their predators more. Without natural selection and adaption there wouldn’t be any big changes from the original species and the species will probably die out if they couldn’t adapt to their problems.
Stabalizing selection
Disruptive selection
Stabilizing selection is when the middle of the two extremes is favoured more. For example a cat will give birth to 6 kittens most of them are weaker and malnourished because she doesn’t have enough food for them, but if she only gives birth to 2 then they wouldn’t have enough viable offspring. So the middle which is around 4 is prefered because you will have enough viable offspring and also they won’t be malnourished.
The last type is Disruptive selection. It’s when the 2 extremes are both favoured more than the middle.
There are three types of natural selection Directional selection, Stabilizing selection and Disruptive selection.
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