They were mostly carnivorous, though some species may have evolved omnivorous traits.

The results suggest that holding on to ancestral development tool kits may play an important role in evolving new physical traits, say the researchers.

Now scientists have published a warning that, by being in our homes, black fungi may be evolving traits that make them more pathogenic to humans.

Members of Dasypodidae, including C. villosus, have evolved very interesting and specific traits to help them survive.

This suggests that many fish genera independently evolved amphibious traits, a process known as convergent evolution.

Seeds have evolved traits to reward animals to enhance their dispersal abilities.

Mainly, these are island species that have evolved specialized traits.

Resident species evolve traits that are fitted to the selection pressures of their local environment.

There are plenty of documented examples where animals have evolved traits and then lost them over time according to natural selection.

"But don't populations typically evolve traits that are beneficial to the species?"