Which of these is not a response of internal stimuli?
a)eating when hungry
b)breathing hard when exercising because of a drop in oxygen levels
c)wearing sunglasses to protect eyes from uv rays
d)drinking when thirsty

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics