Which excretory system contains structures called flame bulbs that function in filtration?
a. metanephridia
b. protonephridia
c. Malpighian tubules
d. kidneys
e. nephrons
Answer: b. protonephridia
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a. bacteria b. fungi c. plants d. both bacterial and eukaryotic cells, although not closely related to either. e. animals
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The muscles that are included in the shoulder girdle group include all of the following except?
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