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Biol 322 Exam 1 2025 Questions and Answers If chimpanzee and human genomes differ only about 1.3% at the level of DNA base pairs, how might we explain the dramatic differences in appearance, behavior, cultures, and so on between humans and chimps? - ....ANSWER ...-Important differences exist in the expression of genes in humans and chimps. The primary process responsible for the adaptive modifications that occur in populations of organisms over geological time is - ....ANSWER ...-Natural Selection Which sources of data do evolutionary biologists use to test their hypothesis? ....ANSWER ...-Data from the fossil record, morphological and behavioral data, molecular data (all) Darwin's hypothesis of common ancestry with branching descent explains ....ANSWER ...-Varieties nested within species, nesting within genera; the history and pattern of life's diversity; the hierarchal patters of similarity observed in nature (all) Considering the phylogenetic evidence that feathers evolved prior to flight, what might have been the original function of feathers? - ....ANSWER ...-Waterproofing, shielding from sunlight, heat retention, facilitating tactile sensation (all) How can we explain the exquisite complexity of some complex traits, such as the vertebrate eye? - ....ANSWER ...-Each intermediate step toward the evolution of complex traits was itself adaptive; intermediate stages of complex traits were functional …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1