Biology 8th Edition by Kenneth Mason ,Jonathan Losos,Susan Singer,Peter Raven,George Johnson

Exercise 12

Across many species of limpets, loss of larval development and reversal from direct development appears to have occurred multiple times. Under the simple principle of parsimony are changes in either direction merely counted equally in evaluating the most parsimonious hypothesis If it is much more likely to lose a larval mode than to re-evolve it from direct development, should that be taken into account If so, how