Multiple Choice
In the evolution of digestive systems
A) cnidarians (corals, anemones and jellyfish) have simple sac-like guts with only a mouth and an anus.
B) sponges have the simplest gut, called a spongocoel, with a mouth, called an osculum, and an anus, called an ostium.
C) nematodes are the simplest animals to manifest a one-way digestive tract.
D) development of peristatsis in tapeworms allowed movement of food through the gut, independent of body movements.
E) organisms with a coelom are most likely to have the longest and most complex guts.
Correct Answer:
Verified
Correct Answer:
Verified
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