Ideas and Principles
Darwin's Ideas
Natural Selection
Speciation
Vocab
100
Refers to the variety of living things that inhabit our planet.
What is diversity?
100
A mechanism by which individuals that have inherited beneficial adaptations produce more offspring.
What is Natural Selection?
100
Tigers with larger jaws and teeth are able to eat shelled reptiles. These tigers are likely to survive longer and leave more offspring than tigers that can eat only mammals.
What is adaptation?
100
The process of forming new species from a species already in existence.
What is speciation?
100
What are homologous structures?
200
The organizing principle of life science.
What is the Theory of Evolution?
200
The heritable differences that exist in every population and are the basis for natural selection.
What are variations?
200
A tiger may produce many offspring, but not all of the young will survive due to competition for resources.
What is overproduction?
200
Increases with speciation.
What is biodiversity?
200
Small leftover organs or structures that had a function in an early ancestor.
What are vestigial structures?
300
The millions of different species of plants, animals, and microorganisms that live on earth today are all related by
What is descent from common ancestors?
300
The differences among individuals result from differences in this.
What is genetic material?
300
Some tigers may be born with slightly larger jaws and teeth.
What is variation?
300
When two populations become separated by a physical barrier, such as rivers, mountains, or lake.
What is geographic isolation?
300
A model of evolution in which short periods of drastic change in species are separated by long periods of little or no change.
What is punctuated equilibrium?
400
Proposed that the organelles of eukaryotic cells were once prokaryotic cells that have been engulfed by a larger prokaryotic cell.
What is the Endosymbiotic Theory?
400
More individuals will have the trait in every following generation, as long as the environmental conditions continue to remain beneficial for that trait.
What is descent with modification?
400
Because large teeth and jaws are heritable traits, they become more common characteristics in the population.
What is descent with modification?
400
When two populations become isolated by differences in courtship rituals.
What is behavioral isolation?
400
The inability of a members of a population to successfully interbreed with members of another population of the same or a related species.
What is reproductive isolation?
500
Modern scientists define evolution as a _________ ______ in the characteristics within a population from one generation to the next.
What is a heritable change?
500
The four main principles to the theory of natural selection.
What are variation, overproduction, adaptation and descent with modification?
500
Organisms with the BEST traits (adaptations) will survive and reproduce. (Don't answer Natural Selection)
What is survival of the fittest?
500
When two populations become isolated because they reproduce at different times or patterns.
What is temporal isolation?
500
The random change in gene frequency in a population.
What is genetic drift?