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Cells & Heredity Chapter 6 Review, Science Cells and Heredity Chapter 6
Terms in this set (45)
a well tested explanation for a wide range of experimental results
any difference between individuals of the same species.
an inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment
pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
pattern of evolution characterized by the slow and steady accumulation of small genetic changes over long periods of time
the preserved remains or traces of an organism that lived in the past
the process by which organisms that are best adapted to their environment are most likely to survive and reproduce
a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce
change over time; the process by which modern organisms have descended from ancient organisms
Darwin observed these types of birds...
Darwin observed finches in the ____________ Islands.
competition, overproduction, variation, selection
The 4 factors that influence natural selection
After making many observations, Darwin concluded that species/organisms have _______ over time.
mate and produce fertile offspring.
Organisms that belong to the same species can __________________.
After a group of organisms becomes isolated from the home/main group over a very long period of time.
How does a new species form?
Because of natural selection, _________ traits eventually accumulate in a species over time
Traits that increase an organisms abilities to survive and reproduce are _____________?
Traits that lower an organisms abilities to survive and reproduce are ___________?
True or False: Charles Darwin was not surprised by the variety of living things he saw on his voyage around the world.
A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.
The preserved remains or traces of an organism that lived in the past.
True or False: Darwin observed the greatest diversity of organisms on the Galapagos Islands.
Many Galapagos organisms were similar to organisms on mainland_______________________.
Darwin thought the ancestors of Galapagos animals and plants came from mainland ______________.
What kind of food does a finch with a large beak eat?
What kind of food does a finch with a small beak eat?
A trait that helps an organism survive and reproduce.
Darwin thought that Galapagos organisms ________________changed over many generations.
__________ ____________ helped Darwin understand how evolution might occur
A well-tested concept that explains many observations.
Individuals with variations that make them better adapted to their environment will have a better chance to ___________ and reproduce.
Effect caused by species producing more offspring that can survive.
Effect caused by limited food and other resources.
Differences between individuals of the same species.
Only traits that are controlled by _____________ can be acted upon by natural selection.
Evidences of theory of evolution
Patterns of early development
Similar body structures
Similar body structures that related species have inherited from a common ancestor.
What similarities in development lead scientists to infer that opossums, chickens, salamanders, and fish share a common ancestor?
During early development all four have a tail and a row of tiny slits along their throats.
Why do scientists classify fish, amphibians, reptiles, birds, and mammals together in one group?
Bone structure is similar - all have a backbone.
True or False: The more closely related species are, the more similar their DNA sequences.
When a group of individuals remains _____________ from the rest of its species long enough to evolve different traits, a new species can form.
What are three ways isolation can occur?
River, volcano, mountain range.
By determining the age of fossils, scientists can reconstruct the history of __________ on Earth.
The millions of fossils that scientists have collected.
What theory says: Evolution occurs slowly and steadily.
Intermediate forms of species?: Yes.
What theory says: Species evolve quickly during relatively short periods.
Intermediate forms of species?: Not many.
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