What does species all have genetic variation?

Genetic variation within a species refers to the differences in DNA among individuals, which can arise from mutations, gene flow, and sexual reproduction. This variation is crucial for a species' adaptability and survival, as it enables populations to respond to environmental changes, resist diseases, and avoid inbreeding. Moreover, genetic diversity can enhance resilience, allowing species to thrive in diverse habitats and under varying conditions. Overall, genetic variation is fundamental to the process of evolution and the long-term viability of species.