| We believe that the results of analysis of body fluids and laboratory experiments are obvious. |
| Save for contrived laboratory studies with bacteria and fruit flies, it cannot be witnessed. |
| This is typically an instance where people taking part in laboratory experiments appear to act irrationally. |
| In general, laboratory studies seem to be able to predict extremely well the behaviour of lichens in their natural habitat. |
| Only a few examples have been described, all based on laboratory experiments in which a large part of the shoot was removed. |
| Competition is certainly one environmental circumstance rarely provided in laboratory experiments. |
