生物都有繁殖过剩的倾向,而生存空间和食物是有限的,所以生物必须“为生存而斗争”。在同一种群中的个体存在着变异,那些具有能适应环境的有利变异的个体将存活下来,并繁殖后代,不具有有利变异的个体就被淘汰。如果自然条件的变化是有方向的,则在历史过程中,经过长期的自然选择,微小的变异就得到积累而成为显著的变异。由此可能导致亚种和新种的形成。——达尔文《物种起源》当环境改变时,机体的细胞,组织或器官通过自身的代谢,功能和结构的相应改变,以避免环境的改变所引起的损伤,这个过程称为适应。——“适应”释义 Creatures have a tendency to over-proliferate, and living space and food are limited, so creatures must “fight for survival.” Individuals in the same population have variations. Individuals with favorable mutations that can adapt to the environment will survive and reproduce offspring. Individuals that do not have favorable mutations will be eliminated. If changes in natural conditions are directional, then in the historical process, after a long period of natural selection, minor variations are accumulated and become significant variations. This may lead to the formation of subspecies and new species. - Darwin’s “Origin of Species” When the environment changes, the body’s cells, tissues, or organs undergo corresponding changes in their metabolism, function, and structure to avoid damage caused by changes in the environment. This process is called adaptation. ——“Adaptation” Interpretation