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Scientific literature distinguishes between biological sex and socially constructed gender, with evolving definitions and complexities.
Biological sex is a multidimensional classification based on physical and physiological traits—chromosomes, reproductive anatomy, hormones and related biology—most commonly labeled male or female at b...
Some animals and many non-animal eukaryotes defy the simple “” story: examples range from classic hermaphrodites (snails, earthworms) to species with genetic or behavioral systems that scientists have...