Some species of rotifers undergo parthenogenesis, which means that __________.
A. their larval stage of development looks completely different from the adult stage
B. they shed their exoskeleton as they grow
C. each individual functions as both male and female in sexual reproduction by producing sperm and eggs
D. during development of adult forms, some of the organs that were bilateral are reduced in size or are lost on one side of the body
E. the species consist only of females that produce more females from unfertilized eggs