In nature, We can find unisexual __i__ flowers and unisexual __ii__ flowers. These flowers can either be in the __iii__ plant or in __iv__ plants.

i – small, ii – large, iii – female, iv – all

i – male, ii – female, iii – male, iv – all  

i – small, ii – large, iii – same, iv – different  

i – male, ii – female, iii – same, iv – different