Behavioural

... group too. - Cladistics propose the clade Sauropsida including both birds and reptiles. Paleontological, anatomical, embriological, molecular and behavioural evidence support their common ancestry. - Living homeotherms are a poliphyletic group as birds and mammals evolved separately. Hope this ...

See entire post

... the same. Taxonomist make groups of organism (taxa) that share common traits. These traits can be morphollogical, embriological, molecular or even behavioural, etc. These similarities may reflect the sharing of a common ancestror , but they can have arised by convergent evolution too. In the first ...

See entire post

... from either parent. This gives rise to genetic diversity in sexually reproducing populations, which provides the variation of physical and behavioural attributes (phenotypes) upon which natural selection acts, at a population level, leading to adaptation within the population, resulting ...

See entire post

It may be possible. I am not a fish breeder, but behavioural changes have been made in a few generations in other species. The example that comes to mind is the breeding of tameness into the silver fox. http://en.wikipedia.org/wiki/Domesticated_silver_fox

See entire post

The point is that it is way more complicated than that. The evolution of behavioural traits that are hard to define, notably in term of limits (when is one rebelious or conformist, or in between?), is something that is often tackled, but usually not very well ...

See entire post