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Cells and Heredity Ch 6
Interactive Science Series
10
Science
7th Grade
12/13/2017

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Term
species
Definition
a group of similar organisms that can mate with each other and produce fertile offspring
Term
fossil
Definition
the preserved remains or traces of an organism that lived in the past
Term
adaptation
Definition
a trait that increases an organism's ability to survive and reproduce
Term
evolution
Definition
the process of change over time
Term
scientific theory
Definition
a well-tested concept that explains a wide range of observations
Term
natural selection
Definition
the process by which individuals that are better adapted to their environment are more likely to survive
Term
variation
Definition
any difference between individuals of the same species
Term
homologous structures
Definition
similar structures that related species have inherited from a common ancestor
Term
gradualism
Definition
involves small changes that add up to major changes over a long period of time
Term
punctuated equilibrium
Definition
involves species evolving during short periods of rapid change followed by periods of not much change
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