NEET BIOLOGY

Detailed explanation-1: -The center zone, labeled a, is called the optimal range. This is the range of conditions under which the organism survives best.

Detailed explanation-2: -Conditions that are most favorable for an organism to survive, grow and reproduce. This optimum is somewhere WITHIN the RANGE OF TOLERANCE for that organism. If an animal has a range of tolerance for temperature of 0-85 degree F somewhere within that temperature range will be the temperature that the animal grows BEST.

Detailed explanation-3: -Range of Tolerance in Biology Exceeding the range of tolerance leads to organism death. Plants, for example, have an optimum range of sunlight. Getting too much or too little sunlight can cause the plant stress. Going beyond the range of tolerance will result in plant death.

Detailed explanation-4: -Just as species have geographic ranges, they also have tolerance ranges for the abiotic environmental conditions. In other words, they can tolerate (or survive within) a certain range of a particular factor, but cannot survive if there is too much or too little of the factor.