Examlex
Cephalochordates have an open circulatory system,and also have a simple heart.
Multiple Choice Questions
Q3: All pseudocoelomate organisms have a complete digestive
Q6: Phoronida<br>A)are small freshwater worms.<br>B)are tube-dwelling marine animals.<br>C)do
Q7: The function of the papulae in the
Q15: Onychophorans<br>A)share some characteristics with annelids and some
Q16: The central nervous system of cnidarians includes
Q27: Movement in annelids involves<br>A)longitudinal muscles only.<br>B)circular muscles
Q34: The infective stage of Ascaris is the
Q38: An example of an animal with an
Q41: The glands that produce an oily substance
Q53: Who was the first African-American in the