A-A+
A．By flying in circles around a fieldB．By dete
问题详情
A．By flying in circles around a field
B．By detecting a chemical signal
C．By inspecting individual corn leaves
D．By noticing the caterpillar"s coloration
参考答案
正确答案：B
解析：How can a wasp find a caterpillar on a corn plant?
