How does a pseudocoelom differ from a coelom?
a. A pseudocoelom is completely lined with mesoderm, while a coelom is not.
b. A pseudocoelom is a fluid-filled body cavity, while a coelom is not.
c. A pseudocoelom is derived from the endoderm, while a coelom is derived from the mesoderm.
d. A pseudocoelom is found in vertebrates, while a coelom is found in invertebrates.