Homologous and Vestigial Structures Review

What is a homologous structure?

• having a body part that has no known function

• similar structures in more than one organism because they evolved from a common ancestor

• a structure that evolved to help an organism survive in their environment

• similar structures that evolved independently in two living organisms to serve the same purpose

Tags

NGSS.MS-LS4-2

What is a vestigial structure?

• having a body part that has no known function

• similar structures in more than one organism because they evolved from a common ancestor

• a structure that evolved to help an organism survive in their environment

• similar structures that evolved independently in two living organisms to serve the same purpose

Tags

NGSS.MS-LS4-2

What evidence do similarities between fossil bones and modern organisms provide?

• species that face similar environmental pressure will develop similar traits.

• homologous structures are evidence that the two species are related or shared a common ancestor

• natural selection

• adaptive structures help organisms survive in their habitat

Tags

NGSS.MS-LS4-2

The structures shown are_________

• homologous

• heterologous

• analogous

• vestigial

Tags

NGSS.MS-LS4-2

The forelimbs of mammals have similar anatomy because these groups descended from a recent common ancestor. Their bone structure is an example of a(n) (a)   structure.

• vestigial

• analogous

• homologous

Tags

NGSS.MS-LS4-2

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

• vestigial structures

• analogous structures

• homologous structures

• fossil structures

Tags

NGSS.MS-LS4-2

Which of the following is an example of a vestigial structure?

• the wings of a red-tailed hawk

• the hind limbs of a house cat

• the fins of sharks

• the tailbone of a human

Tags

NGSS.MS-LS4-2

Which of the following pieces of evolution evidence deals with comparing similar structures in various species?

• fossil record

• comparative embryology

• comparative biochemistry

• comparative anatomy

Tags

NGSS.MS-LS4-2

Which describes how these limbs have changed over time?

• The bones have become stronger.

• The toes have reduced in number.

• The bones have become shorter.

• They have gained additional toes.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which word is defined as a reduced form of a functional structure in 1 organism that shows up as fully functional in another?

• homologous structures

• vestigial structures

• analogous structure

• DNA

Tags

NGSS.MS-LS4-2