Tolerance Limits

• • There are limits to the amount of environmental change that organisms can counteract 
• There are several factors in the internal environment which need to be kept within the particular tolerance limits so that organisms can operate more efficiently
• 'Liebig's Law of the Minimum' describes the impact of limiting factors in biological systems
• A limiting factor was the one variable that, when in short supply, will slow the rate of photosynthesis, irrespective of how abundant or plentiful the other resources might be
• If any variables are outside of their tolerance levels, the organisms will not be able to properly function