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Mr pasone

Chapter 6

TermDefinition
fossil record made up of all the fossils ever discovered on Earth
mold the impression of an organism in a rock
cast a fossil copy of an organism in a rock
trace fossil the preserved evidence of the activity of an organism
geological time scale a chart that divides Earth's history into different time units
extinction when the last individual organism of a species dies
biological evolution the change over time in populations of related organisms
naturalist a person who studies plants and animals by observing them
variation a slight difference in an inherited trait of individual members of a species
natural selection the process by which populations of organisms with variations that help them survive in their environments live longer, compete better and reproduce more than those that do not have the variations
adaptation an inherited trait that increases an organisms chance of surviving and reproducing in its environment
camouflage an adaption that enables a species to blend in with its environment
mimicry resemblance of one species to another species
selective breeding breeding of organisms for desired characteristics
comparative anatomy study of similarities and differences among structures of living species
homologous structure body parts of organisms that are similar in structure and position but different in function
analogous structure body parts that perform a similar function but differ in structure
vestigial structure body parts that have lost their original function through evolution
embryology the science of the development of embryos from fertilization to birth
Created by: jos_r
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