Regarding bill length, island scrub-jays married in a non-random manner. A breeding pair of birds is represented by each point (n = 42). We measured everyone as an adult. When body size was taken into account, the same outcome was achieved.
What is natural selection?
Populations of living things adapt and change through a process called natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways.
This variety indicates that some people have characteristics that are more environment-appropriate than others. The ability to convey genes to the following generation in a way that allows them to do the same is referred to as reproductive success.
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