Random changes in allele frequencies that occur in small populations.

Survival of the fittest

Where organisms are "better" suited for their environment and have adaptations that allow them to survive and reproduce.

Inherited characteristics that increases an organism's chance of survival.

Observed how the characteristics of plants and animals varied on different islands of the Galapagos.

Descent With Modification

Says that "all" organisms are related to one another but "come with changes" from other species over time.

Movement of individuals "into" an area occupied by an existing population.

The ability of an organism to survive and reproduce in its environment.

Where over generations changes in inherited characteristics increase a species' fitness in its environment.

Movement of individuals "out" of an area.

Where nature provided the variation and man selected those variations that were useful or most liked.

The principle that a single "tree of life" links all living things.

"Change over time" where modern organisms have descended from ancient organisms.

A similar body part that comes from a common ancestor. Ex. (The bones of bat wings and the bones of the human hand).

On the Origin of Species

Darwin's book published in 1859 about natural selection later called evolution.

A well-supported testable explanation of phenomena that has occurred in the natural world?

Struggle for Existence

Where members of each species compete for food, space, and other necessities of life.

Small traces of ancestral structures that no longer function, like tiny legs on some snakes.

The preserved remains of ancient organisms.

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Evolution

Term	Definition
Genetic Drift	Random changes in allele frequencies that occur in small populations.
Survival of the fittest	Where organisms are "better" suited for their environment and have adaptations that allow them to survive and reproduce.
Adaptation	Inherited characteristics that increases an organism's chance of survival.
Charles Darwin	Observed how the characteristics of plants and animals varied on different islands of the Galapagos.
Descent With Modification	Says that "all" organisms are related to one another but "come with changes" from other species over time.
Immigration	Movement of individuals "into" an area occupied by an existing population.
Fitness	The ability of an organism to survive and reproduce in its environment.
Natural Selection	Where over generations changes in inherited characteristics increase a species' fitness in its environment.
Emigration	Movement of individuals "out" of an area.
Artificial Selection	Where nature provided the variation and man selected those variations that were useful or most liked.
Common Descent	The principle that a single "tree of life" links all living things.
Evolution	"Change over time" where modern organisms have descended from ancient organisms.
Homologous Structure	A similar body part that comes from a common ancestor. Ex. (The bones of bat wings and the bones of the human hand).
On the Origin of Species	Darwin's book published in 1859 about natural selection later called evolution.
Theory	A well-supported testable explanation of phenomena that has occurred in the natural world?
Struggle for Existence	Where members of each species compete for food, space, and other necessities of life.
Vestigial organ	Small traces of ancestral structures that no longer function, like tiny legs on some snakes.
Fossil	The preserved remains of ancient organisms.

Created by: PRO Teacher Copelaj

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