 Fechner makes it his business to argue that all the reasons for ascribing souls to animals also hold for plants (Nanna: 7). Plants and animals have very similar structures and functions. They share a similar pattern of development (birth, maturity, death); both have similar cellular structures; both require nutrition, both engage in digestion, excretion, respiration. All that we can infer from the differences in their organic structure, function and development is that plants have different souls than our own, not that they have no souls at all (Nanna: 9).