Google Ready NGSS LS4.A Evidence of Common Ancestry Homologous & Analogous


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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 make observations of an evolutionary tree and look for patterns and relationships in that tree. This is a great exercise in met-cognition for the last slides later on in the lesson. Students also read a quick article and watch a video about convergent and divergent evolution which helps them understand the difference between Homologous and Analogous structures. Students watch another video about homologous and analogous structures, fill in a T-Chart and finish up with an interactive slide. This is great for meta-cognition, critical thinking and rich class discussions. This resource is approximately 40 minutes.

I highly recommend you take a look at Evidence of Common Ancestry Homologous and Analogous Worksheet, it’s a perfect complement to this lesson.

I also recommend you take a look at my Distance Learning Evolution Growing Bundle to save lots of money!

This product Includes the following:

-Student Slides

-Teacher slides with suggestions and pacing

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

Convergent Evolution

Divergent Evolution



Structure and Function



Common Ancestor

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