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Terms in this set (18)
Changes in an organism's DNA. This is one way an organism can gain favorable or non-favorable traits
Structures and behaviors that have a functional role in aiding an organism in finding food, shelter, and migrating
The process by which different species are thought to have developed and diversified from earlier forms during the history of earth
This supplies evidence about the sequence of life, the order in which evolution occurred, and how Earth has changed over time.
The solidified remains of an extinct species. Scientists use carbon dating to find the age of these ancient artifacts.
The type of rock (made from sand, minerals, and/or silt) that fossils are most commonly found in
Gaps in the fossil record?
This is because the conditions for fossilization an organism are very rate.
The process by which organisms with favorable traits (suited to their environment) have a better chance of surviving and reproducing
The process by which humans select and breed animals and plants for their particular traits
Occasional; Occurrences appearing or happening at irregular intervals of time.
This species displays genetic variation. Certain members of this species are naturally selected to survive longer due to the favorable traits that suit their environment
The Key to Natural Selection
These organisms survive and reproduce at a greater rate than other organisms
Organisms with traits well suited to their environment
Indirect evidence of the existence of an extinct species. These many be footprints, tracks, impressions, or animal feces
An anatomical feature that no longer has a purpose in the current form of a species. An example of this would be the "coccyx" or tailbone in humans
Differences between parent and offspring within a species. Mutations are a major reason for this.
When a species produces more offspring than will actually survive due to a lack of resources, the presence of predators, or other environmental factors.
Struggle to survive
The natural process of competition among organisms to survive and reproduce in their environment
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