Examlex
Which characteristic of monotremes is ancestral to amniotes?
Y Chromosome
A sex chromosome that is typically present in males, combined with an X chromosome, and determines male biological characteristics in humans.
Testosterone
A steroid hormone associated with male sex characteristics, although present in both genders, affecting mood, energy, and physical development.
Testes
Male reproductive organs that produce sperm and hormones, such as testosterone.
Intimate
Characterized by a close, familiar, and affectionate personal relationship that involves deep knowledge and companionship.
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