#evolutionary adaptation

• Adelphophagy — A specific form of embryonic cannibalism observed in the animal kingdom, particularly in certain sharks, amphibians, or insects, where the strongest embryo feeds on its own siblings or unfertilized eggs inside the uterus or nest before birth or hatching. This structural survival behavior ensures that only the most vigorous specimens reach maturity.
• Amniote — The feminine form of amniot or, in its plural form (amniote), the scientific name for the clade of tetrapod vertebrates whose eggs are adapted for land through the presence of extraembryonic membranes. As an adjective, it describes an anatomical feature, a structure, or a species exhibiting the typical organization of the amniotic sac.
• Anoptic — Lacking functional visual organs, eyes, or light-sensitive receptors; developing or functioning independently of the light spectrum. In biology, the term qualifies troglobiotic species or abyssal organisms structurally adapted to completely dark environments, where orientation relies exclusively on tactile, chemical, or auditory mechanisms.