Anatomy that is similar in structure but differ in function (bat wings, alligator forelimbs, human arms, penguin wings)
Body parts that share a common function, but not structure like bird wings & butterfly wings
Structures that are reduced in size and are no longer useful.
Descent with modification from a common ancestor. There must be change in gene frequency over time.
Scientist who studies fossils.
Organisms that are genetically similar and can reproduce to make fertile offspring.
Inherited trait of a species that develops over time, enabling the species to survive (like opposable thumbs, thorns, camouflage).
Part of Darwin’s evolutionary theory, based on four ideas: excess reproduction, variations, inheritance and the advantages of specific traits in an environment
Study of the similarities and differences in the structures of different species
The branch of zoology studying the early development of living things.
The process of directed breeding to produce offspring with desired traits
(AKA Selective Breeding).
More primitive features, such as teeth and tails, that appear in ancestral forms
Newly evolved features, such as feathers, that do not appear in the fossils of common ancestors
A well-tested explanation for a set of observations or experimental results
A rule that describes a pattern in nature.