Endless forms: human behavioural diversity and evolved universals

Endless forms: human behavioural diversity and evolved universals.

Human populations have extraordinary capabilities for generating behavioural diversity without corresponding genetic diversity or change. These capabilities and their consequences can be grouped into three categories: strategic (or cognitive), ecological and cultural-evolutionary. Strategic aspects include: (i) a propensity to employ complex conditional strategies, some certainly genetically ev...

Endless Forms The Evolution of Gene Regulation and Morphological Diversity

diversity and the long span of time (.540 million years) “...we are always slow in admitting great changes of since their divergence from a common ancestor. Simiwhich we do not see the steps... The mind cannot possilarly, most protostomes and deuterostomes, with the bly grasp the full meaning of the term of even a million exception of the vertebrates (which possess four or years; it cannot add ...

Endless Forms Most Viral

Perhaps more than any other biological discipline, the study of animal viruses is confined to the present. Virions are simply not the stuff of which robust fossils are made. Phylogenetic analysis can help by revealing deep relationships between extant viral lineages, yet such reconstructions lack detail (telling us nothing about transitional or extinct viral forms, the movement of viruses betwe...

Linguistic diversity and universals

Serotonin receptors and systems: endless diversity?

Serotonin is probably unique among the monoamines in that its effects are subserved by as many as 13 distinct heptahelical, G protein-coupled receptors (GPCRs) and a ligand-gated ion channel family (5-HT3). These receptors are divided into seven distinct classes (5-HT1 to 5-HT7) largely on the basis of their structural, transductional and operational characteristics. While this degree of physic...