Which Statement About the Plant Secondary Metabolites Used in "Chemical

Multiple Choice

Which statement about the plant secondary metabolites used in "chemical warfare" against herbivores is false?

A) Many carry out basic plant functions.
B) They have a variety of effects on animals.
C) There are more than 10,000 known types.
D) They vary in size,but most are small molecules.
E) Some are produced by a single species,while others are produced by many different plants.