Evidence for Evolution

Front

A category of body structures that are formed in similar ways during embryonic development and share similar patterns of bone structure.

Back

Homologous structures

Front

What type of structure does this image illustrate? Options: Analogous structures, Homologous structures, Vestigial structures

Back

Homologous structures

Front

Function of yellow bones in bat (similar structure, different function): Fingers to grasp objects, Leg to walk on, Wing for flying, Fin for swimming.

Back

Wing for flying

Front

Function of the white bones in the whale?

Back

Fin for swimming

Front

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

Back

Analogous structures

Front

What type of structure does this image illustrate?

Back

Analogous structures

Front

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

Back

Similar embryonic development

Front

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

Back

Vestigial structure

Front

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

Back

Vestigial

Front

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?

Back

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.