Multicellularity and sex helped shape the Tree of Life.

ABSTRACT: Across the Tree of Life, there are dramatic differences in species numbers among groups. However, the factors that explain the differences among the deepest branches have remained unknown. We tested whether multicellularity and sexual reproduction might explain these patterns, since the most species-rich groups share these traits. We found that groups with multicellularity and sexual reproduction have accelerated rates of species proliferation (diversification), and that multicellularity has a stronger effect than sexual reproduction. Patterns of species richness among clades are then strongly related to these differences in diversification rates. Taken together, these results help explain patterns of biodiversity among groups of organisms at the very broadest scales. They may also help ex

SUBMITTER: Chen L 

PROVIDER: S-EPMC8316805 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature