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Related Concept Videos

Binary Fission01:20

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Fission is the division of a single entity into two or more parts, which regenerate into separate entities that resemble the original. Organisms in the Archaea and Bacteria domains reproduce using binary fission, in which a parent cell splits into two parts that can each grow to the size of the original parent cell. This asexual method of reproduction produces cells that are all genetically identical.
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Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
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Life Tables01:22

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A life table is a statistical tool that summarizes the mortality and survival patterns of a population, providing detailed insights into the likelihood of survival or death across different age intervals within a cohort. By organizing data on survival probabilities and mortality rates, life tables offer a clear snapshot of population dynamics over time. They are extensively used in demography, public health, actuarial science, and ecology to analyze life expectancy, design health interventions,...
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Basic continuous-time signals include the unit step function, unit impulse function, and unit ramp function, collectively referred to as singularity functions. Singularity functions are characterized by discontinuities or discontinuous derivatives.
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Is Life Binary or Gradual?

Christophe Malaterre1,2

  • 1Département de Philosophie, Université du Québec à Montréal, Montreal, QC H3C 3P8, Canada.

Life (Basel, Switzerland)
|May 25, 2024
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Summary
This summary is machine-generated.

Life

Keywords:
alivenessbinary nature of lifeepistemic granularityepistemic perspectivegradualist perspectivegrayness of lifelife definitionslifenessthreshold

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Area of Science:

  • Interdisciplinary exploration of life's definition.
  • Bridging biology, chemistry, and systems science.

Background:

  • Traditional binary view of life (living vs. non-living) is challenged.
  • Intermediate entities in fields like synthetic biology and virology blur distinctions.

Purpose of the Study:

  • To explore motivations for both binary and non-binary conceptualizations of life.
  • To address the need for refined definitions in origin of life research and astrobiology.

Main Methods:

  • Conceptual analysis of life's binary and non-binary definitions.
  • Review of scientific evidence for intermediate life forms.

Main Results:

  • Evidence suggests a spectrum of "lifeness" rather than a strict binary.
  • Current scientific advancements point towards a finer threshold for defining life.

Conclusions:

  • A gradualist perspective on life is increasingly supported.
  • A more refined distinction between inanimate and living entities is necessary.