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Organisms as diverse as bacteria, fungi, plants, and animals manifest a property called “polarity.” The literature shows that polarity emerges as a consequence of different mechanisms in different lineages. However, across all unicellular and multicellular organisms, polarity is evident when cells, organs, or organisms manifest one or more of the following: orientation, axiation, and asymmetry. Here,...
Fifty years ago Max Kleiber described what has become known as the “mouse-to-elephant” curve, i.e., a log–log plot of basal metabolic rate versus body mass. From these data, “Kleiber’s 3/4 law” was deduced, which states that metabolic activity scales as the three fourths-power of body mass. However, for reasons unknown so far, no such “universal scaling law” has been discovered for land plants (embryophytes)...
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