Biological Evidence

A similar trait found in two different species that is the result of having a common ancestor.

• Analogous structure

• Vestigial structure

• Homologous structure

Structures that are similar because they are advantageous, not because they are related.

• Analogous structure

• Vestigial structure

• Homologous structure

A structure that has evolved to have no function in an organism.

• Homologous structure

• Vestigial structure

• Analogous structure

Decide if an example of similar traits is likely a homologous structure or an analogous structure.

"Bird wings and dragonfly wings are both used for flight."

• Analogous structure

• Homologous structure

Decide if an example of similar traits is likely a homologous structure or an analogous structure.

"Clams and snails both have similar muscle structure even though the muscles do different jobs."

• Analogous structure

• Homologous structure

Decide if an example of similar traits is likely a homologous structure or an analogous structure.

"Human and giraffe necks both have 7 vertebrae because we are related.."

• Analogous structure

• Homologous structure

Decide if an example of similar traits is likely a homologous structure or an analogous structure.

"The flaps of a Venus flytrap have a similar makeup to oak leaves."

• Analogous structure

• Homologous structure

All of the following statements are true. Decide which of the examples of molecular biology give evidence for evolution. Check all of the boxes that apply.

• HOX genes are very similar in all animals.

• Bug wings and bat wings are both used for flying.

• Many species share much the same DNA.

• Plant and animal cells have almost all of the same structures.

(a)   are the preserved remains or evidence of a species.

Look at the sample of sedimentary rock to determine which fossil is the oldest.

• 1

• 2

• 3

• 4