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Storyline Narrative 7.5.4

Big Idea: There are similarities and differences in embryos of different species


Students analyze displays of pictorial data to compare patterns in the embryological development across multiple species to identify similarities and differences not evident in the fully formed anatomy.


Students are engaged by being given a strip of cardstock that contains early stage embryo drawings. They are asked to look for patterns within these drawings and to find similarities and differences. Once they have made comparisons they will attempt to identify which organism they are looking at on their student sheet.   


Students continue exploring by being given a second strip  that has further development of the embryos and they once again look for similarities and difference.  Looking at their guesses for identifying the organisms, students will adjust their answers where they see fit.


The students will explain by being  given a third and final strip representing advanced embryo development and once again use their compare and contrast skills to make adjustments to their choices by identifying similarities and differences. Students will make a final decision about which organisms they are looking at. Students will watch the slideshow with the class in which the identity of each organism will be made known. Students elaborate as they compare their answers with the slideshow to see how well they were able to analyze and interpret the pictorial data they were given.

Students will evaluate their understanding of comparative anatomy in different embryos.  They will explain the changes  that the embryos go through by comparing the similarities and differences found at different stages of development.

Episode 1


Can looking at pictorial data help to identify the similarities and differences between developing embryos?


Students will look at three stages of pictorial data to identify patterns of similarities and differences.  Students will analyze and interpret the data to make conclusions about what organisms they are looking at.

Conceptual Understandings

All organisms begin with more similarities than differences. The more an embryo developing the less alike they are.  

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