Seeing that our species is constantly evolving, maybe it is starting to get more uncomfortable to walk on all fours.
Bacterial responses to antibiotics are concentration-dependent. At high concentrations, antibiotics exhibit antimicrobial activities on susceptible cells, while subinhibitory concentrations induce diverse biological responses in bacteria.
I would say the first one a comet. :)
D. A condition that causes narrowing of the coronary arteries so blood flow to the heart muscle is reduced carotid arteries
