Complex sentence: Plants indigenous to the tropics are usually cold sensitive, adapted to high solar radiation, sensitive to small variations in photoperiod (short day plants), and adopted to either extended drought, high precipitation and/or distinct wet and dry seasons.
Split into simpler sentences: Plants indigenous to the tropics are usually cold sensitive and adapted to high solar radiation. They are sensitive to small variations in photoperiod ("short day" plants), and can be adapted to extended drought, high precipitation and/or distinct wet and dry seasons.