A flatworm moves nutrients and gases through its body using ____.
A) a digestive system only
B) a gastrovascular system only
C) simple diffusion
D) a digestive and gastrovascular system
E) a digestive and respiratory system
Correct Answer:
Verified
Q16: The presence of earthworms _.
A)increases free nitrogen
Q17: The sea slugs (nudibranchs) may protect themselves
Q18: "Nerve net" describes the nervous system of
Q19: Four of the five answers are features
Q20: An animal with bilateral symmetry _.
A)has no
Q22: Elephantiasis is caused by damage of valves
Q23: Which animal group does not have tissues?
A)nematodes
B)sponges
C)echinoderms
D)flatworms
E)cnidarians
Q24: Arthropods usually detect chemicals in water or
Q25: The intestinal parasite Ascaris lumbricoides currently infects
Q26: In bilateral animals, _ is contained within
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