A protonephridium:?

Question

1. uses flagellae to drive the excretion of waste material
2. uses blood pressure to drive the excretion of waste material
3. is called a flame cell when many flagellae attach to the cell body, with the nucleus central
4. is found mainly in animals without blood vessels, a coelom, or both


Select your answer from A-E below
A. 2 C. 1, 3, 4 E. All of 1-4 are correct
B. 2, 3 D. 1, 4

Answer 1

a protonephridium is a primitive osmoregulatory or excretory organ consisting of a tubule terminating interally with flame bulb or solenocyte
-there is a tuft of flagella that project out of each flame cell so #1 is correct, therefore we can eliminate A and B right away
-protonephridium are found in lower animals that dont have vascular systems so there is no blood pressure, so we can eliminate answer #2
-as i mentioned they are called flame cells, so answer #3 is correct
-and its found in lower invertebrates that dont have blood vessels or coelom..for example turbellarians. thefore answer #4 is correct
so the right answer is C: 1, 3, 4 are each right

Answer 2

To cut the long story short
the answer is C