Extinction & Evoluion Flashcards
1
Q
Evolution
A
Gradual change in an organism over time.
2
Q
Fossil
A
Preserved remains of ancient living things.
3
Q
Endangered
A
Describes a species that has low numbers and is in danger of becoming extinct.
4
Q
Extinction
A
End of a species, when all of its members have died out.
5
Q
Speciation
A
Separate evolution of two populations of the same species, to form TWO separate species.
6
Q
Isolation
A
Separation of two populations of a species so that they cannot interbreed; e.g. by a geographical barrier such as a mountain range.
7
Q
Mutation
A
Change in the structure of a gene. A mutation may cause a gene to code for a different characteristic.
8
Q
Natural selection
A
The survival of better-adapted organisms.
