orthogenesis

n.

直生现象，直生论；直向演化；

Orthogenesis
Orthogenesis
orthogenesis
Orthogenesis and Evolution
The new orthogenesis
Orthogenesis in the egg capsules of Chimaera
Selection, "Orthogenesis,"and the Fossil Record
Orthogenesis of the hominids: an exploration using biorthogonal grids
Theodor Eimer and orthogenesis: evolution by 'definitely directed variation'.
Evolution on rails: Mechanisms and levels of orthogenesis
Mainstreaming to Full Inclusion: From orthogenesis to pathogenesis of an idea
Making the case for orthogenesis: the popularization of definitely directed evolution (1890-1926)
Sperm structure and motility in the eusocial naked mole-rat, Heterocephalus glaber : a case of degenerative orthogenesis in the abse...