
Blind sac body plan occurs in
Physalia belongs to phylum
Flame cells are found in phylum
_____ is commonly known as hookworm.
Which of the following is bilaterally symmetrical?
Malpighian tubules or coxal glands are organs of excretion found in
_____ is known as living fossil.
The member of second largest phylum is
Excretory system of these molluscs is of open type except
_____ are exclusively marine animals.











