Refer to the paragraph on how caterpillar-damaged plants protect themselves by attracting parasitic wasps

Question

To test the hypothesis that caterpillar saliva and a wound are both necessary to attract the parasitoid wasps you would need to include which of the following in your experiment? I) Slash the corn leaves with a razor blade. II) Put caterpillar saliva on a leaf wound. III) Put caterpillar saliva on an intact leaf. A) only I
B) only II
C) only III
D) I, II, and III

Answer 1

D