macroevolution
LowAcademic / Scientific
Definition
Meaning
Evolutionary change on a grand scale, encompassing the origin of new species and major adaptive transitions, as opposed to small-scale changes within populations.
Large-scale patterns and processes in evolution over long geological time periods, such as the emergence of new phyla, mass extinctions, and major adaptive radiations. It often contrasts with microevolution, which focuses on allele frequency changes within a species.
Linguistics
Semantic Notes
This term is primarily used within evolutionary biology and paleontology. It is a technical concept debated among scientists, with some viewing it as merely an accumulation of microevolutionary events, and others positing it involves distinct processes or emergent properties.
Dialectal Variation
British vs American Usage
Differences
The term itself has identical spelling and meaning. The scientific debate surrounding its mechanisms and reality is equally prevalent in both British and American academic circles.
Connotations
In both dialects, it carries a highly formal, technical, and scholarly connotation. It is not a term used in casual conversation.
Frequency
Used almost exclusively in academic writing, textbooks, and specialized scientific discourse in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
Macroevolution [verb: occurs, happens, proceeds, is studied] over long periods.Scientists [verb: study, debate, model, investigate] macroevolution.The fossil record provides [noun: evidence, insights, a window] into macroevolution.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Virtually never used.
Academic
The central focus of the course is distinguishing between microevolutionary mechanisms and macroevolutionary patterns observed in the fossil record.
Everyday
Almost never used in everyday conversation.
Technical
The model simulates macroevolution by incorporating parameters for speciation rate, extinction rate, and morphological disparity.
Examples
By Part of Speech
noun
British English
- The debate between proponents of punctuated equilibrium and gradualism is fundamentally about the tempo of macroevolution.
- Her research examines the role of developmental constraints in shaping macroevolution.
American English
- The textbook's final chapters are dedicated to patterns of macroevolution and mass extinction.
- He argued that macroevolution is simply microevolution scaled up over geological time.
Examples
By CEFR Level
- Scientists study macroevolution to understand how dinosaurs became birds.
- Macroevolution looks at very big changes in life over millions of years.
- The fossil record provides the primary evidence for studying macroevolutionary trends.
- A key question in biology is whether macroevolution requires processes beyond those seen in microevolution.
- Critics of the Modern Synthesis often point to phenomena in the fossil record that they believe challenge a purely gradualist view of macroevolution.
- The concept of species selection posits a higher-level mechanism that can influence the course of macroevolution independently of individual organism fitness.
Learning
Memory Aids
Mnemonic
Think of MACRO (large-scale) + EVOLUTION. It's the big picture of evolution, like watching a movie of life's history instead of a single frame.
Conceptual Metaphor
A BOOK OF LIFE: Microevolution is like editing sentences within a chapter; macroevolution is the writing of entirely new chapters, the rise and fall of major story arcs, and the creation of new genres over the entire volume of Earth's history.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- The Russian equivalent "макроэволюция" is a direct calque and is used identically in scientific contexts. Be aware that the prefix "макро-" is also used similarly.
Common Mistakes
- Using 'macroevolution' to simply mean 'fast evolution'. Speed is not the primary factor; scale is.
- Confusing it with 'macro' as in economics. The 'macro' here refers to biological scale, not economic systems.
- Using it in non-scientific contexts where 'evolution' or 'large-scale change' would be more appropriate.
Practice
Quiz
Which of the following best describes a focus of macroevolution?
FAQ
Frequently Asked Questions
Commonly yes, that's a standard shorthand definition. It typically involves the origin of new species (speciation), major evolutionary trends within lineages, and the origin of major new body plans or structures over deep time.
No, this is a point of scientific discussion. Some evolutionary biologists view macroevolution as simply the compounded result of many microevolutionary events (population genetics over long periods). Others propose it may involve emergent properties or processes not fully predictable from microevolution alone.
The primary evidence comes from paleontology (the fossil record), comparative anatomy, embryology, and molecular phylogenetics. These fields provide data on the sequence, timing, and relationships of large-scale evolutionary changes.
Not in a human lifetime, due to its vast timescales. We infer macroevolutionary patterns from historical evidence (fossils, DNA sequences) and test hypotheses through modelling and comparative studies. Some argue that rapid radiations, like that of cichlid fish in African lakes, are observable instances of macroevolution in action.