Ultrafiltration and osmoconcentration occur in
a. Protonephridia.
b. Metanephridia.
c. Mesonephridia.
d. metanephridia and mesonephridia.
e. protonephridia and metanephridia.
D
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A) columnar epithelium B) stratified epithelium C) endothelium D) simple squamous epithelium E) mesothelium
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