The drug used against intestinal anaerobic bacteria, that can also alter normal flora causing antibiotic-associated colitis is:

Ifound this on google “aristotle (384–322 bc) in western scientific taxonomy the greek philosopher aristotle was the first to classify all living things, and some of his groups are still used today, like the vertebrates and invertebrates, which he called animals with blood and without blood.” i hope this you for what your looking for.

Droughts cause very arid places such as a desert