Front

Structures with the same parts have different functions; suggests that organisms share a common ancestry

Back

homologous structures

Front

If an organism has a vestigial structure, that structure likely once had a function in a(n)

Back

early ancestor

Front

Some organisms that share a common ancestor have features that have different functions, but similar structures.

Back

homologous structures

Front

Study of embryos of various organisms to show a common ancestor because of similarities in development

Back

embryology

Front

Which of the following is an example of a vestigial structure? Options: the wings of a red-tailed hawk, the hind limbs of a house cat, the fins of sharks, the tailbone of a human

Back

the tailbone of a human

Front

What type of structures are these? Options: homologous, vestigial, analogous, fossil

Back

homologous

Front

Two organisms that are closely related would have

Back

very similar DNA sequence

Front

Which layer is the oldest? Options: B, A, E, C

Back

E

Front

The diagram shows fossils in different rock layers. Which of these statements about the age of these fossils is most likely correct?
Options: Fossil A and C are the same age
, Fossil B is older than fossil C, Fossils A is older than fossil B, Fossil D is older than fossil C

Back

Fossil D is older than fossil C

Front

If two organisms have similar traits or similar genetic sequences of DNA, they probably

Back

share a common ancestor