A fossil is a preserved remains or traces of any organism from the remote past

Traces provide indirect evidence of ancestral forms (footprints, tooth marks)

shows that changes have occurred in the features of living organisms (evolution)

can be dated by determining the age of strata in which fossil is found

Sedimentary rock layers develop in a chronological order

Invertebrates appear before vertebrate species

form of artificial selection, whereby man intervenes in the breeding of species to produce desired traits in offspring

By breeding members of a species with a desired trait, the trait’s frequency becomes more common in successive generations

Selective breeding provides evidence of evolution as targeted breeds can show significant variation in a (relatively) short period