EVOLUTION:
What causes a specie to change (evolve)?
* Variation: changes found in a species
* Mutation: Random change in the DNA
* Overpopulation: Overproduction of a species that can’t be contained by the environment
* Competition: Fighting for resources, the best trait will win
* Inheretance: Traits are passed down from parent to offspring
* Environmental change: natural selection
Does an environment cause a mutation?
No because the mutation already existed but yes because the environment caused the mutation to spread through adaptation.
Definitions:
Evolution: A gradual change of a species characteristics over generations due to natural selection and environmental changes.
Homologous structuresL Features found in different species that share a common evolutionary ancestor.
Fossil: The preserved remains or traces of past life, typically found in sedimentary rock
Embryology: Study of organisms before birth.
Adaptation: An inherited trait that helps for the survival of a species
Natural Selection: A process where organisms with traits best suited to the environment survive and reproduce
Explain how homologous structures are used as evidence for evolution: Homologous structures show us similarities between organisms, showing that they could have a common ancestor.
List three types of evidence that scientists use:
1. Comparative anatomy: fossils and homologous structures
2. Embryology
3. Molecular biology
What is the role of variation in natural selection? Variation helps a specie survive with its best tait. It allows the specie to adapt and evolve.