20 SEP 2011 by ideonexus

 Resistance to Insecticides and Herbicides as Evolution

Still other species have adapted via selection to human-caused changes in their environment. Insects have become resistant to DDT and other pesticides, plants have adapted to herbicides, and fungi, worms, and algae have evolved resistance to heavy metals that have polluted their environment. There almost always seem to be a few individuals with lucky mutations that allow them to survive and reproduce, quickly evolving a sensitive population into a resistant one. We can then make a reasonable ...
Folksonomies: evolution resistance
Folksonomies: evolution resistance
  1  notes

If plants and insects can evolve resistance to these human-induced selective pressures, then we may assume they evolve to other natural environmental pressures as well.

03 MAY 2011 by ideonexus

 Parasititic Influence on Evolution

Again and again in recent years evolutionary biologists have found themselves returning to the theme of parasites. As Is Richard Dawkins put it in a recent paper: "Eavesdrop [over] morning coffee at any major centre of evolutionary theory today, and you will find 'parasite' to be one of the commonest words in ti the language. Parasites are touted as the prime movers in the evolution of sex. promising a final solution to that problem of problems.'" Parasites have a deadlier effect than preda...
  1  notes

Parasites are small and numerous, evolving faster than we do and putting incredible evolutionary pressure on the species they plague.