Evidence For Evolution
An adaptation is anything that gives an organism a better chance of survival. Structural and physiological adaptations are considered direct evidence of evolution. Most of the evidence to support evolution is indirect.
Direct Evidence
Camouflage is the hiding or disguising the presence of a person, animal, or object by means of camouflage.
Mimicry is the close external resembalence of an animal or plant, or part of one, to another animal, plant, or inanimate object.
Indirect Evidence
Indirect evidence comes from fossils, anatomy, biochemical, and embryology.
Natural Selection
Charles Darwin is a naturalist of the 19th century who helped develop the theory of evolution. When Charles mad a trip to the Galapagos island he noticed all the different birds that looked different based on where they were. He then conducted research to see why certain animals looked a certain wayt even when they were the same thing. Charles then concluded they must change over time depending on where they're located which is called evolution.
Natural Selection is "surviaval of the fittest"; when organisms with the strongest traits survive and reproduce
Effects of Natural Selection on Polygenic Traits
Stabilizing selection- Stabilizing selection is when natural selection shifts the survival rates in favor of the organisms near the CENTER of the fitness scale.
Directional Selection- Directional selection is when natural selection shifts surviaval rates from one end of the fitness scale to the other.
Disruptive Selection- Disruptive selection is when natural selection shifts the survival rate from either end of the fitness scale to the ends or vice versa.
Artificial Selection is the breeding of plants or animals for desirable traits.
3 examples of atrificial selection would be breeding animals to make then bigger, crossing plants to make them easier to eat, or even crossing people to get a desirable traits.