Definition:Allen’s rule is a biological rule posited by Joel Asaph Allen in 1877. It states thatendotherms from colder climates usually have shorter limbs (or appendages) than the equivalentanimals from warmer climates.艾伦法则ài lún fǎ zé由乔尔·阿萨夫·艾伦于1877年提出的一......(本文共 298 字) [阅读本文] >>