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27 Cards in this Set

  • Front
  • Back
What is evolution
A change in a species over time
What are vestigial structures?
Structures that are no longer used in an organism.
The structures of a human's arm, a whales flipper, and a cat's are all similar. What are these structures called?
Homologous structures
A species that no longer is found on Earth is said to be what?
What do all of these things have in common? DNA, protien structures, early development, body structures.
They are all evidence of evolution
Who was the naturalist on the beagle?
Charles Darwin
What did Darwin notice about the finches in the different Islands?
They had different beaks that were adapted to the type of food they ate
The gradual change in a species over time is called ....
A trait that helps an organism survive and reproduce is called a
How does Natural selection lead to evolution?
helpful variations accumulate among surviving members of the species
Which term refers to a species creating more offspring than can possibly survive?
Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce
natural selection
differences between members of the same species are called
What is the role of genes in evolution?
Only traits that are controlled by genes can be acted on by natural selection
What are fossils?
the preserved remains or traces of organisms that lived in the past
What did Darwin infer from his observations of organisms in South America and the Galapagos Islands?
A small number of plant and animal species had come to the galapagos Islands from South America
A species is a group of similar organisms that...
can mate with each other and produce offspring
A branching tree is
a diagram showing how scientists think different groups of organisms are related
Fossils are commonly found in
Sedimentary rock
How long does it take for an organism to change
many generations
A change in an organisms DNA is known as
a mutation
geologists have evidence that there once was one land mass called Pangea. The landform split apart into what we see today. How can this play a role in evolution?
As drifting occured, species became separated and the environments changed. This would force the organisms to adapt or evolve to the new environment.
When an organism creates more offspring than the environment can possibly support, this is called...
Humans and rhesus monkey have similar proteins found in blood samples. What does this idicate?
That humand and monkeys have a common ancestor
name the process where desired characteristics are chosen for reproductive purposes
selective breeding
the theory of evolution combines the principles of ...
natural selection
artificial selection
genetic inheritance
genetic resistance
natural selection and genetic inheritance
a blank helps an organism to survive