What is mosaic evolution?

What is meant by the term mosaic evolution?

mosaic evolution, the occurrence, within a given population of organisms, of different rates of evolutionary change in various body structures and functions. An example can be seen in the patterns of development of the different elephant species.

Which is an example of mosaic evolution?

Mosaic evolution is the result of traits evolving at different rates or with different modes. For example, the diversification of locomotor behaviors in birds is thought to be related to the evolutionary independence of the forelimb and hind limb (3, 4, 8).

Is human evolution mosaic?

It is suggested that the evolution of the hominin lineage is consistent with a mosaic pattern of change.

What are the 4 trends of hominin mosaic evolution?

Four levels of transition are proposed—baseline, novel taxa, novel adaptive zones and major transitions—and the pattern of human evolution considered in the light of these.

Which is the best definition for 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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Who developed the mosaic hypothesis?

He observed that in the normal development of Amphioxus, all three main types of symmetry, or cleavage patterns observed in embryos, could be found. Wilson proposed a hypothesis that reformed the Mosaic Theory associated with Wilhelm Roux in Germany.

What is parallel evolution theory?

‘Parallel evolution’ occurs when independent species acquire similar characteristics while evolving together at the same time in the same ecospace. … In parallel evolution, the ancestors of their respective lineages were similar with respect to that trait.

What are the 5 theories of evolution?

The five theories were: (1) evolution as such, (2) common descent, (3) gradualism, (4) multiplication of species, and (5) natural selection. Someone might claim that indeed these five theories are a logically inseparable package and that Darwin was quite correct in treating them as such.

What is divergent evolution?

Divergent evolution represents the evolutionary pattern in which species sharing a common ancestry become more distinct due to differential selection pressure which gradually leads to speciation over an evolutionary time period.