Question

MULTIPLE CHOICE. Choose the letter of the correct answer. Write your answers on a separate sheet of paper.

Answer 1

Answer:

An autotroph or primary producer is an organism that produces complex organic compounds using carbon from simple substances such as carbon dioxide, generally using energy from light or inorganic chemical reactions.

Answer 2

Answer:

In mathematics, the sign function or signum function is an odd mathematical function that extracts the sign of a real number. In mathematical expressions the sign function is often represented as sgn.