Choose the statements below that most accurately describe sipunculans. Select all that apply. Check All That Apply a. Membership in this group is somewhat limited at fewer than 300 known species.
b. Most sipunculans are benthic living in mud or sand burrows.
c. Because sipunculans are aquatic and mostly microscopic they do not need excretory organs to manage waste.
d. Sipuncula species develop gonads seasonally and most are dioecious.