2.4 vocab

• Range of tolerance: range of conditions such as temperature, salinity, pH, or sunlight that an organism can endure before injury or death
• zones of tolerance:

  • optimal zone: range where organisms thrive, grow, and reproduce
  • zone of physiological stress: range where organisms survive, but experience some difficulties (infertility, lack of growth, decreased activity)
  • zone of intolerance: range where the organism will die (thermal shock, suffocation, lack of food/oxygen)