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阅读下面一段文字,完成1—4题世纪之交的生物学(节选)生物学在20世纪取得了巨大进步,数理科学广泛而又深入地渗入生物学的结果,全面改变了生物学的面貌,开辟了在分子水平研究生命现象的新学科——分子生物学。分子生物学的研究,涉及生命现象最本质的内容,把在各个层次的生命活动有机地联系起来,在新的高度上揭示生命的奥秘。分子生物学,自诞生以来短短几十年间所取得的一系列重大进展,深刻揭示了生命现象在数以百万计的不同种属中的表现形式是多种多样、千姿百态的,但是生命世界中最本质的东所有的生物体,从最高等级最复杂的人到最低等级的单细胞生物,其基本组成物质都是
Read the following paragraph and complete the Biology (extract) biology at the turn of the 1-4 century. The biology has made great progress in the 20th century. The mathematical sciences have penetrated extensively and deeply into the biological results and have completely changed the face of biology. It opened up a new discipline that studies life phenomena at the molecular level -- molecular biology. The study of molecular biology involves the most essential content of the phenomenon of life, organically connecting life activities at all levels and revealing the mystery of life at a new height. Molecular biology, a series of major developments since its inception in just a few decades, has profoundly revealed that the manifestations of life phenomena in millions of different species are varied and varied, but the world of life The most essential organisms in the East, from the highest-level and the most complex to the lowest-level single-celled organisms, are basically composed of