Building Trees from a Character Table

30 questions on this block. Tap an answer and it moves on by itself — correct answers advance immediately, misses hold a few seconds so you can read why.

Count the X’s Most X’s in a trait column = the oldest trait, lowest on the tree. Fewest X’s in an organism row = branches off first. Most shared X’s = closest relatives.

Warm-up · not scored

Click the buttons and watch what changes.

Species that share more derived traits share a more recent common ancestor. Look for the species with the most check marks in common.

Part 1Reading a character table

Part 2Ordering the traits

Part 3Building the tree

Part 4Which two are most closely related?

Part 5Applying the models

Building Trees from a Character Table

Warm-up · not scored

Review Complete

Worth another look