Change Over Time

Organisms that are best suited to their environment are more likely to survive and reproduce

Similar structures that related species have inherited from a common ancestor are called

Any change in the DNA of a gene or chromosome is called a

The pattern of evolution that proposes species evolve slowly but steadily is

A well tested concept that explains a wide range of observations

He explored Galapagos Islands & developed the theory of evolution to explain biological change.

The offspring of a horse & a donkey (a mule) is not fertile. Do horses & donkeys belong to the same species?

When a group of animals becomes isolated from the rest of its species for many generations

Differences between members of the same species are called

Any trait that allows an organism to more easily survive and reproduce in its environment.

Evolution in which rapid changes occur for short periods, followed by long periods of no change

Through this process scientists can produce vegetables that are resistant to certain pests.

The 4 lines of evidence of evolution that we studied support these important scientific conclusions:

When more organisms are reproduced than resources available to support them.

The only traits that can be acted upon by natural selection are those that are controlled by

Organisms capable of mating and producing fertile offspring.

This hypothesis proposes that species evolve slowly but steadily.

This process results in offspring that are genetically different from each parent and from each other.

An inherited characteristic that improves an organism's chances to survive & reproduce is a(n)

A change in DNA is called a

A remnant of a once useful structure that no longer has a purpose is called a

The solidified remains or imprint of a previously existing organism is called a 

The forelimbs of a bird and a mammal are examples of

Which of the following is not one of the factors that affect natural selection?

Similarities in early development of cats and bats suggests that these animals share a common

A widely accepted, evidence-based explanation that accounts for observations & current facts.

The only traits acted upon by natural selection are those controlled by

The gradual change in a species over time is called

About 300,000 fossil species which compile a historical sequence of life are called the