Substitutions: A bachelor's degree from an accredited college that includes or is supplemented by the following credit hours will substitute for the degree in a specific field: at least 24 semester hours (36 quarter hours) in biology, a branch of biology, limnology, biometrics, oceanography, forestry, or natural resource management (excluding courses that focus on agricultural husbandry techniques, human population dynamics, or the design and manipulation of landscapes), of which 16 semester hours (24 quarter hours) are upper division courses; and. Substitution: A bachelor's degree from an accredited college that includes or is supplemented by the following credit hours will substitute for the degree in a specific field: at least 24 semester hours (36 quarter hours) in biology, a branch of biology, limnology, biometrics, oceanography, forestry, or natural resource management (excluding courses that focus on agricultural husbandry techniques, human population dynamics, or the design and manipulation of landscapes), of which 16 semester hours (24 quarter hours) are upper division courses; and.