Define That Word
Charles Darwin
Evidence for Evolution
100
Adaptation
A trait that helps an organism survive in its environment
100
What important theory did Darwin come up with?
The theory of evolution by natural selection
100
What is the fossil record?
The way we organize fossils by age and species.
200
Natural Selection
The process where traits that help organisms to survive become more common over time
200
What did Darwin observe about finches that helped him develop his theory?
That they had different body and beak shapes depending on their food source.
200
Darwin noticed that the older a fossil is, the ____ it is like modern animals.
Less
300
Adaptive radiation
A variety of species descend from a common ancestor
300
Darwin's theory was that what had to happen for a new species to form?
A population of organisms needs to be separated from the rest of their species.
300
How does this image show common ancestry?
These species are very different, but all have similar arm structures.
400
Evolution
The process by which a species changes over time
400
Darwin's theory relies on the fact that every population of a species is not identical - they have a variety of _____.
Traits
400
Today, what can we look at to prove common ancestry?
DNA
500
Artificial Selection
The process by which humans select traits in pets, livestock, and plants to get passed on to the next generation.
500
What petty reason caused Darwin to publish his book On The Origin Of Species?
Another scientist was about to publish a very similar theory and take all his credit.
500
How does the fossil record prove change over time?
We see that the older a species gets, the less it looks like modern species, and some old species have gone completely extinct.