Constant Quote by Jean-Baptiste Lamarck
“It is not always the magnitude of the differences observed between species that must determine specific distinctions, but the constant preservation of those differences in reproduction.”
About This Quote
Source Book: Philosophie Zoologique, 1809
Evolutionary change depends not just on how big differences are, but on how consistently they are passed to offspring.
In simple terms: Differences matter when they’re kept across generations.
Key Takeaway
Focus on heritable traits.
Themes
evolution
inheritance
variation
Mood
analytical
thoughtful
Type
scientific
educational
When to use this quote
- breeding programs
- conservation
- medical genetics
- agricultural selection
Key Concepts
natural selection
genetics
adaptation
Questions to Reflect On
- How do we measure the stability of a trait across generations?
- What mechanisms ensure traits persist?
A Different Perspective
If differences are not heritable, they fade, limiting long‑term change.
