Evidence for Evolution

What type of structure does this image illustrate?

• Analogous structures

• Homologous structures

• Vestigial structures

In this image, the yellow shaded bones all appear similar in structure. However, their functions differ. Which describes the function of the yellow bones in the bat?

• Fingers to grasp objects

• Leg to walk on

• Wing for flying

• Fin for swimming

Tags

NGSS.MS-LS4-2

Select the two most important characteristics that distinguish homologous structures.

• Similar bone structures

• Similar function

• Similar embryonic development

• Similar species

A category of structures that have a similar function, but are structurally different.

• Homologous structures

• Analogous structures

• Vestigial structures

• Common core structures

What type of structure does this image illustrate?

• Homologous structures

• Analogous structures

• Vestigial structures

Tags

NGSS.HS-LS4-1

Which of the following is NOT true of analogous structures?

• Similar embryonic development

• Structures that perform the same function

• Different structural characteristics

• Different embryonic development

What are the most important characteristics of analogous structures?

• Structures that perform the same function

• Structurally different

• Structurally the same

• Structures that perform different functions

A type of structure that is physically present, but does not seem to serve a significant function for an organism.

• Homologous structure

• Analogous structure

• Vestigial structure

• Standard structure

The appendix, tailbone, and wisdom teeth are all examples of what type of structure in humans?

• Homologous

• Analogous

• Vestigial

• Modern

Observe the two fish in the image. The cave fish and minnow are genetically related to each other and are similar in many ways. The cave fish lives very deep in the ocean where there is no light. It has only the remnants of eyes and is blind. Minnows live in shallow waters where the water has light. Their eye sight is important for their survival. Which statement below best describes these two fish?

• The DNA of the cave fish has changed over time to differ from the minnow. Since there is no light where the cave fish lives, it was not necessary to have working eyes. Over time, mutations occurred which proved to improve the survival of the cave fish, which is why they are now blind and have only physical remnants of eyes.

• The DNA has not mutated over time and despite all of the evidence that suggests these two are genetically similar, one has eyes and the other does not so they must not be related.

• Cave fish must have been attacked by predators, which is why they only have the remnants of eyes.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-1

NGSS.HS-LS4-4

NGSS.HS-LS4-5