Unit 5 Review

These cause variations.

• mutations
• adaptations
• a desire to change
• injuries

A slight difference in an inherited trait between individual members of the same species.

• variations
• adapatations
• homologous structures
• analogous structures

An inherited trait that increases an organism's chance of surviving and reproducing.

• variation
• adaptation
• vestigial structure
• mutation

The discovery of DNA and genes proved that

• Darwin was wrong
• mutations create variations and come from genes
• we are all the same species
• bats and butterflies have a very close common ancestor

The study of the similarity and differences in body structures between species.

• comparative anatomy
• embryology
• molecular biology
• archaeology

Body parts of organisms that are the same in structure and position but different in function.

• embryos
• homologous structures
• analogous structures
• vestigial structures

Body parts that function like each other, but are different in structure.

• embryos
• homologous structures
• analogous structures
• vestigial structures

Body parts that have lost their original function.

• embryos
• homologous structures
• analogous structures
• vestigial structures

Organisms with these structures are believed to be closely related.

• analogous structures
• homologous structures 
• mutated DNA
• gills

Organisms with these structures are NOT believed to be closely related.

• analogous structures
• homologous structures
• vestigial strucutres
• gills