Biology HL

Chapter 11: Evolution, Speciation and Ecosystems

Reconstruct ancestry with classification and cladistics, model how gene pools evolve and split, and connect adaptation, niches and competition to biodiversity.

1 simulation entries

Molecular Cladogram Workbench

Change pairwise sequence distances, add derived-character evidence and test which branching relationship is best supported.

Appears in: 11.1 Classification and Cladistics, 11.2 Selection, Gene Pools and Hardy–Weinberg, 11.3 Evidence for Evolution and Speciation, 11.4 Niches, Adaptation and Biodiversity

ancestry · frequency · isolation · niche

Evolution & ecosystems laboratory

MOLECULAR PHYLOGENY · branch order, not visual spacingTaxon ATaxon BTaxon Crootolder common ancestormost recent noded(A,B) = 4d(A,C) = 8