Biology SL

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

Selection Distribution Laboratory

Move the environmental optimum, strengthen selection and split resources to compare directional and disruptive outcomes.

Appears in: 11.2 Selection, Gene Pools and Hardy–Weinberg, 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