Evidence map›Paper›PMID 28664404›Full record

ArticleJournal of molecular evolution2017

Chemical Evolution and the Evolutionary Definition of Life.

Paul G Higgs

Abstract read
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In one paragraph

Article in Journal of molecular evolution, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed.

  1. Article
  2. Evolution from Composome to RNA Replicase.Life (Basel, Switzerland) · 2026
    Review
  3. Article
  4. Review
  5. Is Life Binary or Gradual?Life (Basel, Switzerland) · 2024
    Article
  6. Article
  7. Article
  8. Review
  9. The ecology-evolution continuum and the origin of life.Journal of the Royal Society, Interface · 2023
    Article
  10. Article
  11. Article
  12. Order and Complexity in the RNA World.Life (Basel, Switzerland) · 2023
    Article
  13. A Mutation Threshold for Cooperative Takeover.Life (Basel, Switzerland) · 2022
    Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Origin of Life: The Point of No Return.Life (Basel, Switzerland) · 2020
    Article
  19. Article
  20. Life in The Context of Order and Complexity.Life (Basel, Switzerland) · 2020
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author.

Paul G HiggsOrigins Institute and Department of Physics and Astronomy, McMaster University, Hamilton, ON, Canada. higgsp@mcmaster.ca.ORCID 0000-0001-5220-9760

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Darwinian evolution requires a mechanism for generation of diversity in a population, and selective differences between individuals that influence reproduction. In biology, diversity is generated by mutations and selective differences arise because of the encoded functions of the sequences (e.g., ribozymes or proteins). Here, I draw attention to a process that I will call chemical evolution, in which the diversity is generated by random chemical synthesis instead of (or in addition to) mutation, and selection acts on physicochemical properties, such as hydrolysis, photolysis, solubility, or surface binding. Chemical evolution applies to short oligonucleotides that can be generated by random polymerization, as well as by template-directed replication, and which may be too short to encode a specific function. Chemical evolution is an important stage on the pathway to life, between the stage of "just chemistry" and the stage of full biological evolution. A mathematical model is presented here that illustrates the differences between these three stages. Chemical evolution leads to much larger differences in molecular concentrations than can be achieved by selection without replication. However, chemical evolution is not open-ended, unlike biological evolution. The ability to undergo Darwinian evolution is often considered to be a defining feature of life. Here, I argue that chemical evolution, although Darwinian, does not quite constitute life, and that a good place to put the conceptual boundary between non-life and life is between chemical and biological evolution.

Indexed as

Evolution, ChemicalOrigin of LifeBiological EvolutionDNA ReplicationMutationOligonucleotidesPolymerizationRNARNA, CatalyticOligonucleotidesRNARNA, CatalyticChemical evolutionDefinition of lifeError thresholdOrigin of lifeQuasispeciesRNA world

Identifiers

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.