Where do we find evidence for what extinct organisms looked like?
What are fossils?
A gradual process of change throughout time. The changes that take place occur slowly, over millions of years, and represent different species gradually developing in different and changing environments.
What is evolution?
The identification by humans of desirable traits in plants and animals that they choose to breed is called?
What is artificial selection?
Identifying similar structures in early development of animals, which signifies common ancestry
What is comparative embryology?
What do we call similar body parts on dissimilar organisms that can be evidence for a common ancestor?
What are homologous structures?
What evidence can be found when looking into a chicken's egg, a turtle's egg and a rat foetus that indicate a common ancestor?
What are similarities in early development?
Why is Lemark's theory that giraffes grew long necks from stretching wrong based on information about adaptations?
What is being born with adaptations that don't change?
What are similarities in DNA an indication of?
What is a common ancestor?
This type of dating is expensive and uses radioactive elements that decay in organisms.
What is carbon dating?
What features of different species that are similar in function but not necessarily in structure called (e.g. butterfly wing and bird wing)?
What are analogous structures?
Caused by geographic isolation that prevents the flow of genes between separate populations of a species (e.g. a mountain range or river).
What is speciation?
How long does it take for evolution to occur?
What is MANY generations?