Which characteristics best describe earthworms?
A) polychaete; fluid filled coelom
B) oligochaete; open circulatory system
C) moves by longitudinal muscle contraction; hydrostatic skeleton
D) oligochaete; scavengers; closed circulatory system
E) hermaphrodites that fertilize themselves; open circulatory system
Correct Answer:
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Q1: Four of the five answers listed below
Q2: A gastrovascular cavity is present in _.
A)flatworms
Q3: Nematocysts in cnidarians are _.
A)reproductive cells
B)excretory organs
C)sets
Q4: The protist that is most closely related
Q5: A mantle is found only among the
Q7: Four of the five answers listed below
Q8: How do marine polychaetes use chitin-hardened body
Q9: Bilateral symmetry is characteristic of _.
A)cnidarians
B)sponges
C)jellyfish
D)flatworms
E)coral polyps
Q10: Molting in arthropods involves primarily a change
Q11: The mollusks with the largest brain and
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