How do scientists diagram evolutionary relationships? Scientists represent evolutionary relationships with tree diagrams (also called cladograms) because new life forms appear the way new branches ...

Intracellular endosymbionts that originally descended from free-living prokaryotes have been important in the evolution of eukaryotes by giving rise to two cytoplasmic organelles. Mitochondria arose ...

Tree thinking is a pedagogical approach that emphasises the interpretation and construction of phylogenetic trees to elucidate evolutionary relationships. In the context of evolutionary biology ...

This evolutionary tree shows the split between primate and rodent lineages about 90 million years ago, before the emergence of Alu elements in primates and B/ID elements in rodents. These short ...

A newly discovered primate fossil is crucial for illuminating a pivotal event in primate and human evolution--the divergence between the lineage leading to modern monkeys, apes, and humans ...

Why do you have five fingers? Why not ten, or twenty, or one? Why do so many animals have five fingers? Five seems to be the perfect number for most hands. Oddly, the first vertebrates to come onto ...