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Principles of Evolution

Across
The process of biological change by which descendants come to differ from their ancestors
Structures that perform similar functions but have different structures
The layering of rock types that help measure time
Developed the classification system for organisms
Structures that had a function in the past but are no longer functional
Changes in landforms result from slow changesover a long period of time
Natural selection resulting in species with adaptation that are well suited for survival and reproduction
Genes that no longer function but are still contained in the DNA
Variation among members of different species
The differences in physical traits of an individual from other individuals
A picture of the past that shows evolutionary change
Down
Traces of organisms that lived in the past
Variation among members of the same species
Selective breeding of animals to "select" certain traits
A mechanism by which individuals with inherited, beneficial adaptations usually produce more offspring
A feature that allows an organism to better survive in its environment
Traits that are similar in structure but appear to have different functions
Intermediate species between ancestral forms and the descendants of the organism
Came up with the Theory of Catastrophism
A group of organisms that can reproduce and have fertile offspring