Common Ancestry NGSS LS4.A Worksheet Google ready


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If you are teaching NGSS Disciplinary Core Ideas LS4.A: Evidence of Common Ancestry and Diversity, this resource is perfect for you! Students first use their background knowledge and attempt to answer questions about the comparative anatomy of a turtle, human, horse, bird, bat and seal. This is a great exercise in met-cognition for the last 4 questions. Students do the same with a bird, bat and bee. Students then do research on the differences between Homologous and Analogous structures. Students quickly learn that the turtle, human, horse, bird, bat and seal all have homologous structures and that the bird, bat and bee have analogous structures. This is great for meta-cognition, critical thinking and rich class discussions. This resource is approximately 50 minutes.

If you like this product, check out the bundle it’s included in:

Evolution LS4.A LS4.B LS4.C Google Ready Growing Bundle Natural Selection!

This product Includes the following:

-Student Handout

-Editable PowerPoint for classroom management and student instructions

-Link to make a copy for Google Classroom

-Editable Key

This resource has the following NGSS Standards:

NGSS Disciplinary Core Ides (DCI):

LS4.C: Adaptation

Anatomical similarities and differences between various organisms living today and between them and organisms in the fossil record, enable the reconstruction of evolutionary history and the inference of lines of evolutionary descent. (MS-LS4-2)

NGSS Cross Cutting Concepts (CCC)

Crosscutting Concepts


Patterns can be used to identify cause and effect relationships. (MS-LS4-2)

Graphs, charts, and images can be used to identify patterns in data. (MS-LS4-1),(MS-LS4-3)

Cause and Effect:

Phenomena may have more than one cause, and some cause and effect relationships in systems can only be described using probability.

Structure and Function:

Complex and microscopic structures and systems can be visualized, modeled, and used to describe how their function depends on the shapes, composition, and relationships among its parts; therefore, complex natural and designed structures/systems can be analyzed to determine how they function. (MS-LS3-1)

This resource has the following concepts:

Homologous Structures

Analogous Structures

Comparative Anatomy



Structure and Function



Common Ancestor

Selective Pressure

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