Site Feedback

Utah Science

Curriculum Consortium

Tyson Grover 

tgrover@dsdmail.net

Annette Nielson

afonnesbeck@dsdmail.net

Storyline Narrative 7.5.3

Standard 7.5.3: Construct explanations that describe the patterns of body structure similarities and differences between modern organisms and between ancient and modern organisms to infer possible evolutionary relationships.

Student Friendly Objective: I can explain how patterns found in the body structures of modern organisms and ancient infer that they have possible evolutionary relationships.

Anchor Phenomenon: The structure of the American alligator hasn’t changed much, which we’ve learned about through body structure evidence (see article from episode 1)

Big Idea: Modern and ancient body structures give evidence of evolutionary relationships.

Teacher introduces the phenomenon using the article about the American alligator and discuss the idea that the fossil record and modern and ancient structures show evolutionary relationships.

Students will explore various modern bones and compare their similarities and differences to an ancient fossilized bone.

Students will describe the patterns of body structures. Once they compare the similarities and differences between ancient and modern organisms, they will be able to infer possible evolutionary relationships.

Students will elaborate using their data.  They will be able to synthesize the data they have been looking at and determine which show strong or weak evidence of change throughout time.

Students will gather evidence to find out which organism is the whale's closest relative. They will see what their evolutionary path looks like.  They will gather evidence in three areas:

  1. DNA evidence

  2. Fossil evidence

  3. Comparative anatomy

By exploring and explaining the homologous bones that organisms share students can follow the patterns as we move along the evolutionary trees.  These patterns should make it is evident that organisms which share homologous bones also share a common ancestor somewhere in their past.

Finally, students will evaluate their understanding of patterns seen throughout time by taking the assessment. This allows students to show their understanding and learn that they have gained.

Conceptual Understandings

Bones carry many similarities down through the generations of time. Understanding how one bone functions in a modern animal can help us infer how similar bones worked in ancient organisms.

What can we learn from studying homologous structures and their changes over time?

Snapshot

Students will be able to describe the patterns of body structures similarities and differences between ancient and modern organisms to infer possible evolutionary relationships.

Episode 4a

Question

Can comparing Ancient and Modern bones help us understand evolutionary relationships?

 

Episode 4b

Question

Can comparing Ancient and Modern bones help us understand evolutionary relationships?

Snapshot

Students will be able to describe the patterns of body structures similarities and differences between ancient and modern organisms to infer possible evolutionary relationships.

Conceptual Understandings

Bones carry many similarities down through the generations of time. Understanding how one bone functions in a modern animal can help us infer how similar bones worked in ancient organisms.

What can we learn from studying homologous structures and their changes over time?

 

Episode 5

Question

What can we learn from studying homologous structures and their changes over time?

Snapshot

Students will gather evidence to find out what is the whale's closest relative. What does their evolutionary path look like? They will gather evidence in three areas:

  1. DNA evidence

  2. Fossil evidence

  3. Comparative anatomy

Conceptual Understandings

By using DNA evidence, fossil evidence, and comparative anatomy we are able to identify what organisms are closely related and what organisms have little similarities.  Students see that many organisms share a common ancestor somewhere in their evolutionary line.