Name two organisms that have one opening into the digestive


Compare and contrast the manner in which sponges and anemones acquire oxygen and rid themselves of carbon dioxide and the way they acquire food and rid themselves of food wastes.

Name two organisms that have one opening into the digestive tract and two organisms with a separate mouth and anus. What is the disadvantage of a single opening over a complete digestive tract?

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Biology: Name two organisms that have one opening into the digestive
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