Floral zygomorphy, the recurring evolution of a successful trait

Article Abstract:

Flowers with bilateral symmetry (zygomorphic) evolved in several clades independently as an adaptation to specialized methods of pollination and played an important role in the diversification of flowering plants. In addition, the origin of zygomorphy is being studied by comparing the function of CYC-like genes in species with zygomorphic flowers with their function in species with radially symmetrical flowers.

Methods, Flowers, Angiosperms, Pollination

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Evolution of the neural basis of consciousness: A bird-mammal comparison

Article Abstract:

A study aims to validate some of the principal, competing, mammalian consciousness-brain theories by comparing these theories with data on both cognitive abilities and brain organization in birds. The general conclusion reveals that most of the consciousness-brain theories appear to be valid for the avian brain.

United States, Brain research, Birds

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Insights into the evolution of the nucleolus by an analysis of its protein domain repertoire

Article Abstract:

A model for the late and continuous evolution of the nucleolus in early eukaryotes is described. The substantial eubacterial and eukaryotic contributions to nucleolus evolution are revealed.

Eukaryotes, Nucleons

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