Question: If there is no heritability for shell thickness within a population of snails, what happens to shell thickness in response to crab predation?

Question: Create the psychometric function that you would expect if the returned echo is shifted by 90 degree relative to the outgoing pulse of the echolocating bat, Eptesicus. Show the psychometric function as a plot of percentage correct versus ?t. Explain your answer in less than 100 words.