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Unit 15-Evolution

Evolution Flash Cards

QuestionAnswer
Evolution the gradual change over time of organisms as they respond to environmental changes
Adaptations structures organisms develop in response to environmental changes
Cytology the study of cells and their organelles
Embryology the study of embryos
radioactive dating use of radioactive elements to determine the age of fossils
vestigial structures parts that no longer have a use but are still found in an organism
variation the different forms a trait may take
natural selection organisms best suited to an environment pass on traits to their offspring
speciation development of new species due to environmental change
mutation change in an organisms DNA which may lead to changes in the species
reproductive isolation barriers such as rivers and mountains which may stop organisms from mating
gradualism evolution which takes place slowly and steadily over time
punctuated equilibrium long periods of no changes followed by short bursts of sudden change
heterotroph hypothesis a set of ideas which attempt to explain how life started on earth
Created by: mrmpellegrino
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