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For a class of 32. Students use 2 lines of evidence to model evolutionary relationships. They examine the external anatomy of 5 preserved specimens and create a cladogram based on anatomical similarities. Next, they compare the amino acid sequence of the cytochrome c protein of each specimen to that of humans and construct a second cladogram based on these molecular similarities. Finally, they create a revised cladogram that considers both morphological characteristics and genetic information.
Use external features and DNA evidence to argue evolutionary relationships among a set of organisms.
PE: HS-LS4-1 Time Requirement: 3 45-minute Class Periods
SEP: Obtaining, Evaluating, and Communicating Information CCC: Patterns DCI: LS4.A: Evidence of Common Ancestry and Diversity
In this classroom kit, students use 2 lines of evidence to model evolutionary relationships. First, students examine the external anatomy of 5 preserved specimens, note external morphological similarities between the animals, and then create a cladogram based on anatomical similarities. Next, students compare the amino acid sequence of the cytochrome c protein of each specimen to this amino acid sequence in humans. Students then construct a second cladogram based on these molecular similarities. Using information from both exercises, they then create a revised cladogram that considers both morphological characteristics and genetic information.
Kit is designed for a class of 32 students working in groups of 4 and includes 2 of each preserved specimen (grasshopper, crayfish, perch, frog, and rat), comprehensive teacher's manual with reproducible student guide, and FREE 1-year access to digital resources that support 3-dimensional instruction.
This kit builds toward the following Performance Expectation:
• HS-LS4-1.
Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.
This item is sold and shipped to schools and businesses only. Not available to individuals or residential addresses. For substitution suggestions, please call us at 800.334.5551 (8am to 8pm, ET, Monday-Friday).
Components | Qty | Included? |
---|---|---|
Carolina's Perfect Solution® Crayfish | 2 | Included |
Carolina's Perfect Solution® Grasshoppers | 2 | Included |
Carolina's Perfect Solution® Frogs | 2 | Included |
Carolina's Perfect Solution® Rats | 2 | Included |
Preserved Perch | 2 | Included |
Self-Locking Storage Bags | 10 | Included |
Carolina Science Online® Resources (1-year subscription) | 1 | Included |
Teacher's Manual with Reproducible Student Guide | 1 | Included |
Rulers or Straightedges | 32 | Needed, Not Included |
Highlighters | 16 | Needed, Not Included |