Vocabulary
natural selection, trait, adaptation, species, genetic variation, abiotic, genetic mutation, sexual selection, habitat, natural selection, trait, adaptation, species, genetic variation, abiotic, genetic mutation, sexual selection, habitat, adaptation, behavioral adaptations, evolution, natural selection, physiological adaptations, reproduction, structural adaptation, traits, variations, natural selection, trait, adaptation, species, genetic variation, abiotic, genetic mutation, sexual selection, habitat, variations, unfavorable variation, reproduction stage, species, mutations, genome, inherit, evolution, natural selection, vertebrates, spinal column, fish, amphibians, reptiles, birds, embryos, embryology,, evolution, homologous structures, analogous structures, embryological development, DNA, common ancestor, adaptation, evolution, species, sedimentary, diversity, traits, anatomy, Darwin, fossil, adaptation, genome, rock layers, embryo, vertebrate, invertebrate, fish, mammal, amphibian, bird, dorsal nerve cord, notochord, pharyngeal slits, tail