Micraster
Micraster A genus of Upper Cretaceous echinoids (Echinoidea) that is common in France and England and occurs in much of Europe. Much has been written about evolution in this genus, starting with A. R. Rowe in 1899, and adaptations in the genus either to burrowing or to varying substrates have also been suggested.
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explosive evolution , explosive evolution A sudden diversification or adaptive radiation of a group. The term is an old one, rarely used nowadays. Phases of explosive evol… Parallel Evolution , parallel evolution The development of related organisms along similar evolutionary paths due to strong selection pressures acting on all of them in t… Quantum Evolution , Skip to main content
quantum evolution Iterative Evolution , Skip to main content
iterative evolution Britain, Ireland, France, and the Low Countries , much / məch/ • adj. & pron. (more / môr/ , most / mōst/ ) a large amount: [as adj.] I did not get much sleep I did so much shopping | [as pron.] he d… Upper , up·per1 / ˈəpər/ • adj. 1. situated above another part: his upper arm the upper atmosphere. ∎ higher in position or status: the upper end of the soci…
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Micraster