Adaptation, Genetic Variation, Physiology, Species
Adaptation
the process or state of adjusting to new environmental conditions, or a structure resulting from this change that enhances survival
Behavior
the way an organism, person, or system acts, reacts, or conducts themselves in response to external or internal stimuli
Competition
an interaction between living organisms—either within the same species or between different species—competing for limited resources like food, water, light, or space
Fitness
measures an organism's success at surviving and reproducing in its environment, defined by its ability to pass genes to the next generation
Gene Pool
the total sum of all genetic material—including all genes and their various alleles (variants)—present within a specific, interbreeding population of organisms
Genetic Variation
the difference in DNA sequences between individuals within a population, arising from mutations and genetic recombination
the physical separation of populations of the same species by geographic barriers like mountains, rivers, or oceans
Morphology
the scientific study of the size, shape, structure, and configuration of organisms, including both external appearance (color, pattern, shape) and internal components (organs, bones, tissues)
Natural Selection
a fundamental mechanism of evolution where organisms better adapted to their environment tend to survive and produce more offspring
Phenotypic Expression
the manifestation of an organism's genetic information (genotype) into observable physical, biochemical, or behavioral characteristics
Physiology
the process where genetic information (DNA) is converted into functional products, primarily proteins
Population
a group of individuals of the same species inhabiting a specific geographical area, capable of interbreeding, and sharing a common gene pool
Reproductive Isolation
the biological mechanisms, behaviors, and physiological processes that prevent members of two different species from interbreeding or producing fertile offspring
Speciation
the evolutionary process by which populations evolve to become distinct, reproductively isolated species
Species
the process where distinct, inherited patterns of gene activity (transcription/translation) create phenotypic differences that separate species
Trait
the process by which genetic information (genotype) is manifested as an observable characteristic or physical feature (phenotype) in an organism
Sexual Selection
a form of natural selection where individuals with certain inherited traits are more successful than others at obtaining mates and reproducing, often leading to extreme physical traits