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Related Concept Videos

What is Natural Selection?01:32

What is Natural Selection?

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Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
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Limits to Natural Selection01:38

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Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
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Natural Selection and Adaptation01:15

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Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
Beyond physical adaptations,...
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Natural Selection and Mating Preferences01:06

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The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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Antibiotic Selection00:57

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Overview
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Frequency-dependent Selection01:21

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Related Experiment Video

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Global Identification of Co-Translational Interaction Networks by Selective Ribosome Profiling
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Natural Selection: How Selection on Behavior Interacts with Selection on Morphology.

Joseph Travis1, David N Reznick2

  • 1Department of Biologicial Sciences, Florida State University, Tallahassee, FL 32306, USA.

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|August 22, 2018
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Summary
This summary is machine-generated.

Behavior and morphology evolve independently. A natural experiment reveals that while selection impacts both traits, it does not link their evolutionary paths, suggesting distinct evolutionary trajectories for behavior and form.

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Area of Science:

  • Evolutionary biology
  • Behavioral ecology
  • Quantitative genetics

Background:

  • Understanding the interplay between behavioral plasticity and morphological evolution is crucial for explaining adaptive radiations.
  • Behavior can influence the selective pressures acting on morphology, potentially accelerating or buffering evolutionary change.
  • Previous research has explored this relationship, but experimental evidence from natural settings remains limited.

Purpose of the Study:

  • To experimentally investigate whether behavioral evolution can accelerate or buffer morphological evolution in a natural population.
  • To determine if selection acts concurrently on behavior and morphology.
  • To assess the independence of selection acting on these two trait types.

Main Methods:

  • A field experiment was conducted on a natural population.
  • Selection gradients were estimated for behavioral and morphological traits.
  • The experiment involved manipulating environmental conditions to observe responses.

Main Results:

  • Selection was found to act on both behavioral and morphological traits.
  • Crucially, selection on behavior was independent of selection on morphology.
  • This indicates that behavioral and morphological evolution may proceed along separate pathways.

Conclusions:

  • Behavioral evolution does not appear to accelerate or buffer morphological evolution in this system.
  • Selection acts independently on behavior and morphology, suggesting distinct evolutionary dynamics.
  • Future research should explore the genetic and developmental mechanisms underlying this independence.