Question

Which of the following is an example of positive feedback?

A. Abscisic acid (ABA) in plants slows bud growth in cold temperatures.
B. An increase in ethylene gas causes fruits to ripen more quickly.
C. Taking a tranquilizer slows the speed of signal transmission in neurons.
D. Panting in dogs increases the amount of cool air in nasal passages and lowers body temperature

Answer 1

The correct option is B.
A positive feed back refers to the amplification of a particular effect by its own influence on the process that gives rise to it. In positive feed back, the specific response that is obtained as a result of a process continue to increase as the process continues or increase, that is both the process and the effect generated increase.