Lines of Evidence for Evolution

a bat’s wing that enables it to fly

the tiny leg bones found in snakes that have no legs

the front legs of a dog that supports its weight as it walks and runs

the tentacles of an octopus that aid it in movement and catching prey

developed in a common environment

identical genetic makeup

developed from the same earlier species

identical methods of obtaining food

Whales can travel on land when necessary.

Whales are developing into animals with four functioning limbs.

Whales evolved from four-legged animals.

Whales have functional legs that are hidden by fat and skin.

vestigial structures

homologous structures

adaptive radiation

fossil

A recent common ancestry

Evolution from a distant common ancestor

Similar environments in the past

No evolutionary relationship between the groups