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Ch. 16 Evolution

Did You Study?

Study of patterns in the geographic distribution of species and communities Biogeography
The scientific study of similarities and differences in body plans. Comparative Morphology
Physical evidence of a species that lived in the past and is now extinct Fossil
When a species gets a mutation that fits in with the environment and passes the trait to offspring. Adaptation
Change in a line of descent Evolution
A species ability to reproduce and spread the ability to the offspring to survive and reproduce for generations to come. Fitness
Line of descent Lineage
When a species has to choose what kind of species it has to reproduce with because of that species' specific traits (e.g. a bird reproducing with another bird that can camouflage when predators come) Natural Selection
The time it takes for half of a quantity of a radioisotope to decay Half-Life
Method of estimating the age of a rock or fossil by measuring the content and proportions of a radioisotope and its daughter elements Radiometric Dating
A supercontinent that formed before Pangea that formed more than 500 million years ago Gondwana
A supercontinent that formed about 270 million years ago Pangea
A theory stating that the Earth's outer layer is cracked into plates. Plate Tectonic Theory
Chronology of Earth's history. Geologic Time Scale
Similar body structures that evolved separately in different lineages Analogous Structure
Body structures that are similar in different lineages because they evolved in a common ancestor Homologous Structure
Evolutionary pattern in which similar body parts evolve separately in different lineages Morphological Convergance
Evolutionary pattern in which a body part in an ancestor changes in its descendants Morphological Divergence
Created by: moiz.yousufi86



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