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20-21 Savvas Topic 8

TermDefinition
mechanism The natural process by which something takes place.
fitness How well an organism can survive and reproduce in its environment.
fossil record All the fossils that have been discovered and what scientists have learned from them.
homologous structures Structures that are similar in different species and that have been inherited from a common ancestor.
embryo A young organism that develops from a fertilized egg.
species A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce.
fossil The preserved remains or traces of an organism that lived in the past.
natural selection The process by which organisms that are best adapted to their environment are most likely to survive and reproduce.
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