Question

do all frogs call? no, only males call. only males have vocal sacs to call. males call and females go look for the males to mate. biologists have tested if females have a preference for males based on the pitch of their call (e.g. high pitch, midrange, or bass). to test this possible phenomenon female bullfrogs were placed in an enclosure surrounded by three different speakers, each providing a different pitch of call. which of the following would be the independent variable for the frog call experiment? the response measured none are correct pitch of the call female mate choice 3 multiple choice 1 point which null hypothesis is best for the frog call experiment? males decide everything pitch of the call does not affect female mate choice. pitch of the call does influence mating. none are correct pitch of the call does affect female mate choice 4 multiple answer 1 point regarding the frog calling experiment, if 100 female frogs were tested and 85 of those chose the bass calling male, what would you conclude? pitch of call does impact female mate choice female frogs are not impacted by pitch of call reject the null hypothesis fail to reject the null hypothesis

Explanation:

1. In an experiment, the independent variable is what the researcher manipulates. Here, the pitch of the call is being changed to test female mate - choice, so pitch of the call is the independent variable.
2. The null hypothesis is a statement of no effect. In this case, it is that the pitch of the call does not affect female mate - choice.
3. If 85 out of 100 female frogs choose the bass - calling male, it indicates that the pitch of the call impacts female mate - choice, and we reject the null hypothesis.

Answer:

1. C. Pitch of the call
2. B. Pitch of the call does not affect female mate choice.
3. A. Pitch of call does impact female mate choice

C. Reject the null hypothesis