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Table 1 Table of body parts included in preactivity discussion and in the remainder of the exercise

From: Phylogenetic Analysis: How Old are the Parts of Your Body?

Body hair

Very large brain

Placenta

Amniotic egg

Mammary gland

Muscles

Forelimbs and hindlimbs

Opposable thumb

Nipples

Hinged jaw

Left–right symmetry

Vertebrae

  1. This table is drawn on the board at the beginning of the student-led preactivity discussion. Students are prompted to work as a group to place the human body parts in order from oldest to youngest and to record the class hypothesis (for comparison to analytic results obtained later)