35. At the start of each trial of the experiment, the gravid frog was most likely placed:
Your Answer is
Correct Answer is D
Explanation
Option C cannot be realized. In the arena shown in figure 1, no point can be 1.8m away from two speakers at the same time. So C is excluded;
Because it is necessary to test whether the female frog will move towards the alternative speaker, it must be at a distance of 2.5cm from the alternative PRR, so B is excluded;
Put both In the middle of two speakers, it is fairest to have the same distance from both sides, only option D is suitable