Multiple Choice
The phoronid circulatory system:
A) is a closed system but lacks a heart.
B) has hemoglobin dissolved in the plasma.
C) is an open system with pulsatile organs circulating the hemolymph.
D) is an open system with no heart and is dependent upon the hemoglobin enclosed in nucleated cells.
E) is missing and all food and wastes readily diffuse through the lophophore.
Correct Answer:
Verified
Correct Answer:
Verified
Q16: The valves of brachiopods are<br>A)secreted by the
Q17: The _ includes the lophophore,digestive tract,muscles,and nerve
Q18: The three lophophorate phyla are Phoronida,Ectoprocta,and _.
Q19: "Lamp shells" are not included in Mollusca
Q20: Why are entoprocts not included with the
Q22: The coelom of a lophophorate is divided
Q23: The chamber in which each zooid of
Q24: Which is NOT a correct description of
Q25: A lophophorate phylum that is primarily marine,but
Q26: Reproduction and development in phoronid worms involves<br>A)monoecious