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McGraw Hill Ch. 6 (7th Grade)
This is made up of all the fossils ever discovered on Earth.
The impression of an organism in a rock.
A fossil copy of an organism in a rock.
The preserved evidence of the activity of an organism.
Geologic Time Scale
A chart that divides Earth's History into different time units.
This occurs when the last individual organism of a species dies.
The change over time in populations of related organisms.
A person who studies plants and animals by observing them.
A slight difference in an inherited trait of individual members of a species.
The process by which populations of organisms with variations that help them survive in their environments live longer, compete better and reproduce more than those that do not have the variation.
The inherited trait that increases an organism's chance of surviving and reproducing in its environment.
The adaptation that enables a species to blend in with its environment.
The resemblance of one species to another.
The breeding or organisms for desired characteristics.
The study of similarities and differences among structures of living species.
Body parts of organisms that are similar in structure and position but different in function. These structures suggest an evolutionary relationship.
Body parts that perform a similar function but differ in structure.
Body parts that have lost their original function through evolution.
The science of the development of embryos from fertilization to birth.