A Major Difference Between Primary and Secondary Production in Ecosystems

Multiple Choice

A major difference between primary and secondary production in ecosystems is that secondary production involves

A) using metabolism to release nutrients for use, whereas primary production does not.
B) obtaining energy from organic, rather than inorganic, compounds.
C) obtaining energy from sunlight, rather than from chemical compounds.
D) plants, seaweeds, and algae, whereas primary production involves animals.
E) production of different classes of organic compounds than primary production does.