What is a cladogram?

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Prepare for the March Mammal Madness Vocabulary Test. Use flashcards and multiple choice questions with hints and explanations to enhance your learning experience. Get yourself ready for the exciting challenge!

Multiple Choice

What is a cladogram?

Explanation:
A cladogram is a branching diagram that shows hypothesized evolutionary relationships based on shared derived traits. It groups organisms into clades—an ancestor and all its descendants—using traits that evolved in a lineage after that ancestor split. This emphasis on shared derived traits (synapomorphies) helps trace common ancestry rather than just overall similarity or timing of divergence. The other ideas described—population size changes over time, geographic distributions, or food web interactions—don’t depict evolutionary branching or ancestry, so they aren’t cladograms.

A cladogram is a branching diagram that shows hypothesized evolutionary relationships based on shared derived traits. It groups organisms into clades—an ancestor and all its descendants—using traits that evolved in a lineage after that ancestor split. This emphasis on shared derived traits (synapomorphies) helps trace common ancestry rather than just overall similarity or timing of divergence. The other ideas described—population size changes over time, geographic distributions, or food web interactions—don’t depict evolutionary branching or ancestry, so they aren’t cladograms.

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