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Change over time

Terms in this set (21)

What is the definition of evolution?
The process of change over time
Animals that live in the ocean are going to need adaptations for what kind of environment?
Water environment
List some adaptations animals in a water environment will need
Fins and flippers
Definition of variation
Any difference between individuals of the same species
How can a group of organisms evolve if separated from the group?
If they are separated and not able to mate with the members of the rest of the species,
they are going to mate with their fellow organisms and begin to evolve different traits.
While studying on the Galapagos Islands Darwin figured out that animals had
______over time.
Changed
What is the definition of selective breeding? How does this relate to Darwin?
organisms with the desired characteristics are allowed to produce
offspring. Darwin thought that this similar process took place in nature.
When some members of a species are isolated what happens?
They are more likely to form a new species.
What happens to organisms with helpful variations that are more suited to their
environment?
They are going to survive and reproduce and their offspring will also have the helpful
variations.
What does DNA help to show in organisms?
How closely related the species are related
What is the definition of gradualism?
This involves small changes that add up to major changes over a long period of time
The traits are controlled by what can be passed down even if natural selection
has taken place?
The traits controlled by genes can be passed down.
When looking at vertebrate of animals or if you trace back some organisms far
enough scientists have discovered that some organisms share what?
A common ancestor
What is the definition of natural selection?
The process by which individuals that are better adapted to their environment are more
likely to survive and reproduce more than other members of the same species
What is the definition of species?
A group of similar organisms that can mate with each other and produce fertile
offspring.
How are evolution and natural selection related?
Helpful variations accumulate among surviving members of the species
Which word best describes species creating more offspring than can possibly
survive?
Overproduction
What is the definition of adaptation?
A trait that increases an organism's ability to survive and reproduce
What is the definition of homologous structures?
Similar structures that related species have inherited from a common ancestor
Fossils, patterns of early development, similar body structures, and similarities in DNA
and protein structures all provide ________.
Evidence that organisms have changed over time
If the environment would change on a species would the offspring of that species
have the same adaptations?
No, because the environment made that species change. The genes passed on to the
offspring wouldn't change.
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