Darwin
Natural Selection
Populations
Evidence for Evolution
100
Where did Darwin conduct most of his research?
Galapagos Islands
100
What is a change in species over time?
evolution
100
What is a population?
a group of the same species, living in the same place
100
What are fossils?
any piece or remanent of living things
200
Where did Darwin believe the ancestors of the Galapagos species came from?
South America
200
What is natural selection?
the process by which organisms better suited for an environment reproduce more
200
What is a species that has disappeared permanently?
extinct
200
What is a vestigial structure?
something that has no purpose, but indicates past history
300
What did Darwin believe was the most important thing that could cause species to evolve?
their environment
300
What does natural selection eventually change?
gene pools/alleles in a population
300
What will happen in a population if food and resources are scare?
competition
300
What do homologous structures indicate?
a common ancestor
400
When Darwin completed his work, what type of scientific knowledge was missing?
genetics
400
What has to be present first, in order for natural selection to occur?
genetic variation
400
What is the process by which a species or population becomes more suited to its environment?
adaptation
400
What is a human vestigial structure?
tailbone
500
Why did the finches Darwin studied have different shaped beaks?
they had different food sources
500
Describe the rate of evolution or natural selection.
gradual/steady
500
What will happen to organisms that are more suited to their environment?
they will reproduce more
500
How are biological molecules used to show evolution?
compare similarities and differences
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