On an absolute scale, there are two reasons:
Bacteria
Selective breeding is used for more rapid evolution or artificial breeding.
No
Punctuated equilibrium.
A humid warm environment
Bacteria
Bacteria
Bacterial evolution results in bacteria that are resistant or immune to medicine and/or our immune system.
Rapid evolution is where the subjective species in a population is considered to be evolving in an unusually high frequency and rate, thus 'rapid' evolution is occuring.
Selective breeding is used for more rapid evolution or artificial breeding.
Fossil
Because nothing is proof of evolution.
Rapid
Punctuated equilibrium
The theory of rapid evolution rather than over a very long time.
Bacteria :)
Hydra