Which of the following is NOT a function of the conducting zone?
A. filtering and cleaning the air
B. All of the choices are functions.
C. gas exchange
D. warming and humidifying the air

answer; /// the correct )

i think the answer is gold im not entirely sure

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )