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The Design at Work
Understanding the Design
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adaptations alleles amino acids animals atoms bacteria bees behavior biologists Biology blood body called capillaries carbohydrate carbon dioxide cells Chapter chemical chlorophyll chromosomes colony corn cytoplasm digestive eggs embryo energy environment enzymes evolution example factors fibers function gametes genes genetic genotype glands glucose growth heredity hive honeybee hormone hydrogen insects larvae living mammals membrane metabolism molecules muscle mutations natural selection nerve neurons normal organisms oxygen parasite plants plasma pollen population predators problem produced protein reactions released reproduction Scientific American seeds soil species sperm structure substance sugar synthesis tissue traits tube vitamin