PHYSICAL (HIGHLY SEXUALLY DIMORPHIC) - the males develop _____ which are ( ______) and also develop ______ ______, and are ______ than females.
a. Scent Glands / Flattened Pads / Facial Discs / Larger
b. Secondary Sexual Characteristics / Dominance Displays / Brightly Colored Plumage / Smaller
c. Secondary Sexual Features / Bony Horns / Exoskeletons / Equal in Size
d. Reproductive Organs / Visual Signs / Elongated Tails / Smaller