生存竞争：同种或异种生物个体相互竞争，来维持个体生存和种族繁衍的自然现象。达尔文自然选择学说认为它是推动生物进化的重要因素。比如说蜜蜂，蜜蜂虽然过着群体生活，但是蜂群与蜂群之间互不串通。为了防御外群蜜蜂和其他昆虫动物的侵袭，蜜蜂形成了守卫蜂巢的能力。螫针是它们的主要自卫器官。在蜂巢内蜜蜂凭灵敏的嗅觉，根据气味来识别外群的蜜蜂。在巢门口担任守卫的蜜蜂不准外群蜜蜂进入巢内。如有外群入巢盗蜜的蜜蜂，守卫蜂立即进行搏斗，直到来者被逐出或死亡。在蜂巢外面，如花丛中或饮水处，各个不同群的蜜蜂在一起互不敌视，互不干扰。
变异：定义生物有机体的属性之一，它表现为亲代与子代之间的差别。变异有两类，即可遗传的变异与不遗传的变异。现代遗传学表明，不遗传的变异与进化无关，与进化有关的是可遗传的变异，后一变异是由于遗传物质的改变所致，其方式有突变与重组。同种生物世代之间或同代生物不同个体之间在形态特征、生理特征等方面所表现的差异。
意思差不多就够拉,不要求完全一样呢.谢谢拉.
Struggle for existence: Homogeneous or heterogeneous biological individual mutual competition, maintains the natural phenomenon which the individual survival and the race multiply. The Darwin natural selection theory thought that it is promotes the organic evolution the important attribute. For example honeybee, honeybee, although community life, but between the colony and the colony is not in cahoots mutually. Outside in order to defend the group honeybee and other insect animal's attack, the honeybee formed guarded the honey-comb ability. The sting is their main self-defense organ. Outside the honey-comb the honeybee depending on the keen sense of smell, distinguishes the group honeybee according to the smell. Holds the post of the honeybee which in the nest entrance guards not to permit the group honeybee to enter joins a gang. If outside has the honeybee which the group joins a gang to rob the honey, guards the bee to carry on the fight immediately, is expelled until the future or the death. Outside honey-comb, if in the flowering shrubs or the potable water place, each different group's honeybee in is not hostile to mutually together, does not disturb mutually.
Variation: One of definition biology organism's attributes, it displays for between the parental generation and filial generation's difference. The variation has two kinds, then inherits the variation with the variation which does not inherit. The modern genetics indicated that does not inherit the variation has nothing to do with the evolution, what with evolution related is may inherit the variation, the latter variation is as a result of the genetic material change result, its way has the sudden change and the reorganization. Between the homogeneous biological generation or with the generation of biological different individual between the difference which in aspects and so on shape characteristic, physiological characteristic displays.