Terms in this set (16)
Change in the genetic makeup of a population over time
A characteristic that improves an individual's ability to survive and reproduce in a particular environment.
A group of individuals that belong to the same species and live in the same area
A group of similar organisms that can breed and produce fertile offspring.
more organisms are born than the environment can support
organisms express slight phenotypical differences due to sexual reproduction and mutations.
when two or more organisms strive for the same goal but only one can obtain it (food, resources, etc.)
A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
survival of the fittest
Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called natural selection
An evolutionary process in which one species splits into two or more species.
Anatomically similar structures inherited from a common ancestor that serve different functions (cat's leg / dolphin flipper)
Structures of different species having similar function but not from the same evolutionary origin. This is due to similar environmental pressures
remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species.
Change in allele frequencies in a population over generations. (ex. change in color/size)
Changes significant enough in allele frequencies to create new species.
cut the tails off of mice & proved that acquired characteristics were NOT inherited