IndietroEvolution of Complexity definitions
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1/15IndietroSkip to main contentIndietroComplex Trait
A characteristic composed of multiple interacting parts, arising through gradual modifications that each provide functional advantages. Exaptation
A process where an existing structure acquires a new function, distinct from its original evolutionary role. Adaptation
A feature shaped by natural selection that enhances survival or reproduction in a specific environment. Feather
A structure in birds, originally evolved for insulation, later enabling flight through modifications. Flight Feather
A specialized structure in birds essential for powered flight, derived from earlier forms used for warmth. Natural Selection
A mechanism where advantageous traits become more common in a population over generations. Microraptor
A small dinosaur with gliding adaptations, illustrating the evolutionary transition from insulation to flight. Vertebrate Eye
A complex, camera-like organ in animals with backbones, capable of image formation and focus adjustment. Eye Spot
A simple light-detecting structure, providing basic information about light presence to early organisms. Eye Cup
A curved, three-dimensional light-sensitive structure that allows detection of light direction. Pinhole Eye
A structure with a small opening that forms a basic image by focusing incoming light, similar to a camera obscura. Lens
A transparent structure in the eye that focuses light to form clear images on sensory cells. Iris
A muscular ring in the eye that regulates the amount of light entering by adjusting the pupil size. Mollusk Eye
A camera-like visual organ in mollusks, independently evolved and structurally similar to vertebrate eyes. Structure-Function Relationship
The principle that the form of a biological feature is closely linked to its role or utility in an organism.
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