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Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the
Space-filling model of an actin filament (shades of red) with one myosin head (gray and two shades o
Three common eukaryotic promoter consensus sequence elements
Bacterial Origin-of-Replication Consensus Sequences
An older woman with wrinkled skin, gray hair, and darker teeth, smokes a cigarette.