Complex sentence: At room temperature, the egg to pupal stage lasts about 6--11 h. With an increase in temperature of the surrounding environment, metabolic rates of the blow fly typically increase, causing an increase in the rate of growth and development.
Split into simpler sentences: At room temperature, the egg to pupal stage lasts approximately 6--11 hours. When there is an increase in temperature of the surrounding environment, typically metabolic rates of the blow fly increase, causing an increase in the rate of growth and development.