Which animals have a gut with two openings (a mouth and an anus) ?
A) cnidarians
B) annelids
C) flatworms
D) sponges
E) tapeworms
Correct Answer:
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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
Q13: Which group is characterized by radially symmetrical
Q14: The smallest adult chelicerates are _.
A)horseshoe crabs
B)mites
C)scorpions
D)spiders
E)ticks
Q15: The only winged invertebrates are from which
Q16: The presence of earthworms _.
A)increases free nitrogen
Q17: The sea slugs (nudibranchs) may protect themselves
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