What is a selection mosaic?

Geographic selection mosaics: The structure of natural selection on interactions differs among environments (e.g., high vs. low temperatures, high vs. low nutrient conditions; a surrounding species web that is species-rich vs. species poor).

What is geographic mosaic theory of coevolution?

Geographic mosaic theory of coevolution, in ecology, the theory postulating that the long-term dynamics of coevolution may occur over large geographic ranges rather than within local populations.

What does the geographic mosaic theory predict about coevolutionary outcomes?

The geographic mosaic theory of coevolution predicts that hot and cold spots, selection mosaics and trait remixing should result in the three major patterns of coevolution described above.

Why is coevolution potentially dangerous?

Being tasted and spit out by a bird is a most dangerous experience for a butterfly. Therefore, mimicry presumably leads to a coevolutionary race — the mimics evolving toward the color patterns of the models, and the models evolving away from the converging mimics.

What is mosaic evolution?

Mosaic evolution (or modular evolution) is the concept, mainly from palaeontology, that evolutionary change takes place in some body parts or systems without simultaneous changes in other parts. Another definition is the “evolution of characters at various rates both within and between species”.

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What is reciprocal selection?

Coevolution, or reciprocal selection, is when each of two interacting species affects the fitnesses of phenotypes in the other species. Mutualistic coevolution is when both species receive a benefit from the coevolutionary relationship. This can become an obligate (required) trait.

What do you mean by divergent evolution?

Divergent evolution refers to the process by which interbreeding species diverged into two or more evolutionary groups. It means that these groups of species used to be similar and related. … Divergent evolution is one of the three types of evolutionary patterns; the other two are convergent and parallel.

What is the escape and radiate hypothesis?

Escape and radiate coevolution is a hypothesis proposing that a coevolutionary ‘arms-race’ between primary producers and their consumers contributes to the diversification of species by accelerating speciation rates.

What is meant by the Red Queen hypothesis?

The Red Queen hypothesis was coined in evolutionary biology to explain that a species must adapt and evolve not just for reproductive advantage, but also for survival because competing organisms also are evolving. …

What are the two drivers of natural selection?

The core of Darwin’s theory is natural selection, a process that occurs over successive generations and is defined as the differential reproduction of genotypes. Natural selection requires heritable variation in a given trait, and differential survival and reproduction associated with possession of that trait.

What is the main driver of natural selection?

Natural selection, a concept first introduced by British naturalist Charles Darwin in 1859, is a cornerstone of biology that says evolution is driven by organisms passing along beneficial traits that help them survive and reproduce while weeding out unfavorable ones.

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What are the 5 forces of evolution?

Five different forces have influenced human evolution: natural selection, random genetic drift, mutation, population mating structure, and culture. All evolutionary biologists agree on the first three of these forces, although there have been disputes at times about the relative importance of each force.

Is coevolution a form of natural selection?

Coevolution refers to several processes. … In its most frequent usage, coevolution refers to genetic changes in the characteristics of interacting species resulting from natural selection imposed by each on the other—that is, reciprocal adaptation of lineages to each other.

What are two types of evolution?

Types of Evolution

  • Divergent Evolution. When people hear the word “evolution,” they most commonly think of divergent evolution, the evolutionary pattern in which two species gradually become increasingly different. …
  • Convergent Evolution. …
  • Parallel Evolution.

How does evolution affect our daily life?

One of the more important evolutionary concerns facing humans today is the continual evolution of antibiotic-resistance in bacteria. … Similarly, the use of pesticides in agriculture has driven the evolution of resistant insects, requiring the use of harsher chemicals in greater quantity to kill them.

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