orthogenetic
The scientist studies the orthogenetic development of the ammonite fossil series.
Adjective: Relating to or characterized by orthogenesis, a biological theory that evolution proceeds in a predetermined direction, often in a straight line, due to internal factors rather than natural selection.
- (Describing a theory of directed evolution.)
- (Referring to the rejection of predetermined evolutionary trends.)
- (Characterizing an adherence to a linear, goal-directed view of evolution.)
"Orthogenetic principle": the idea that evolutionary change follows a predetermined, linear progression.
- The orthogenetic principle was once popular but is now largely discredited. (The concept of a fixed evolutionary direction.)
"Orthogenetic trend": a pattern of evolution that appears to move in a single direction over time.
- The orthogenetic trend in certain ammonite fossils shows increasing shell complexity. (A directional pattern in fossil evidence.)
Orthogenesis (n): the theory itself; the process of evolution along a predetermined line.
- Orthogenesis was proposed by some early evolutionary biologists. (The concept of directed evolution.)
Orthogeneticist (n): a proponent or scholar of orthogenesis.
- The orthogeneticist argued that evolution is internally driven. (A person who supports the theory.)
Orthogenic (adj): an alternative form of "orthogenetic," meaning the same.
- The orthogenic view of evolution is rarely defended today. (Synonymous with orthogenetic.)
- Directed: guided toward a specific outcome.
- Teleological: exhibiting purpose or goal-directedness (often used in related philosophical contexts).
- Preordained: determined in advance (less technical, but similar in meaning).
On a predetermined path: following a fixed course without deviation.
- The species seemed to be on a predetermined path toward extinction. (Describing an orthogenetic-like pattern in nature.)
A straight line of development: a linear, uninterrupted progression.
- His theory assumed a straight line of development for all organisms. (Reflecting the orthogenetic idea of linear evolution.)