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Bio Ch. 17

QuestionAnswer
Fossil record shows Evidence of past lives.
What is a half life? Time it takes for half of a radioactive substance to decay
Big division of the geologic time scale? Era
Short division of the geologic time scale? Period
Earth's most recent era Cenozoic Era
What is coevolution? Process in which two species evolve in response to one another
Example of coevolution. Plants & insects- if the plant evolves then the insect will adapt to the change
What do mass extinctions encourage? Evolution of a new species.
A single species that has evolved into several different forms that live in diff ways. Adaptive radiation & divergent radiation.
Pattern where species experience long, stable periods interrupted by brief periods of evolutionary change Punctuated equilibrium
Pattern where species experience many small changes over long period of time Gradualism
Scientists use this technique to determine age of a rock in years Radioactive dating
This era included the Cretaceous/Jurassic/Triassic Period Mesozoic
Extinction is when All organisms of a certain species die out.
Unrelated species start looking like each other convergent evolution
Example of convergent evolution dolphin's fluke & fish's tail
Created by: madeedoodle
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