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The history of the camel provides an example of how fossil evidence can be used to reconstruct migration and subsequent evolution. The fossil record indicates that the evolution of camelids started in North America (see figure 4e), from which, six million years ago, they migrated across the Bering Strait into Asia and then to Africa, and 3.5 ...
Template documentation ... Part of the Biology series on: Evolution; Mechanisms and processes; Adaptation; Evolution; Genetic drift; ... Evidence; Evolutionary ...
The trackway Protichnites from the Cambrian, Blackberry Hill, central Wisconsin. A trace fossil, also known as an ichnofossil (/ ˈ ɪ k n oʊ f ɒ s ɪ l /; from Greek: ἴχνος ikhnos "trace, track"), is a fossil record of biological activity by lifeforms but not the preserved remains of the organism itself. [1]
•To set it to display one particular list while keeping the remainder collapsed (i.e. hidden apart from their headings), use: {{Evolutionary biology |expanded=listname}} or, if enabled, {{Evolutionary biology |listname}}
The theory of recapitulation, also called the biogenetic law or embryological parallelism—often expressed using Ernst Haeckel's phrase "ontogeny recapitulates phylogeny"—is a historical hypothesis that the development of the embryo of an animal, from fertilization to gestation or hatching (), goes through stages resembling or representing successive adult stages in the evolution of the ...
[[Category:Evolution templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Evolution templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
Evidence for any such direction in evolution is however hard to acquire and can also result from developmental constraints that limit diversification. [47] For example, in the gastropods , the snail-type shell is always built as a tube that grows both in length and in diameter; selection has created a wide variety of shell shapes such as flat ...
Each round of selection samples mutants on all sides of the starting template (1) and selects the mutant with the highest elevation, thereby climbing the hill. This is repeated until a local summit is reached (2). Directed evolution is a mimic of the natural evolution cycle in a laboratory setting.
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