It depends on what level you wish to contribute to the field. For instance, with a 3-4 year Bachelor degree you could enter as a technician or lab assistant. Or, if you wanted more control over the experiments you could earn yourself a doctorate, which normally takes at least 3 years to do over and above Bachelors (so 7-8 years), or Bachelors + Masters (8-9 years).
4 years
22 years
19 years
4 years
about 5 and a half years
Computer
Incomplete question - does not say what 'it' refers to
two years
1886 to 1894
It took many many years
It is a bachelors course and takes minimum 3 years for completion.
They will take at least 4 years to complete. Many degrees in biology also include field work which will take a few eyars to complete as well.