Evolutionary History & Relationship

What is it called when organisms share a similar ancestor?

• fossil record

• common ancestry

• anatomy

• evolution

The study of the structures and parts of animals and plants

• common ancestry

• evolution

• fossil record

• anatomy

fill in the blank: _____________________ are similar structures that come from the same ancestor but may have a different function.

• analogous structures

• fossil record

• homologous structures

• evolution

Changes in allele frequency over time

• fossil record

• anatomy

• evolution

• common ancestry

The diagram provided here is a phylogenetic tree (cladogram). It shows how groups of organisms are related through a shared evolutionary history. Which of the following provides the best evidence that can be used to create this diagram?

• The habitats in which the animals live

• Competition between organisms for resources

• Similarities and differences in body structures

• Observations of interactions in the wild