托福作文范文:植物学的起源
Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights. It is impossible to know today just what our Stone Age ancestors knew about plants, but form what we can observe of pre- industrial societies that still exist a detailed learning of plants and their properties must be extremely ancient. This is logical. Plants are the basis of the food pyramid for all living things even for other plants. They have always been enormously important to the welfare of people not only for food, but also for clothing, weapons, tools, dyes, medicines, shelter, and a great many other purposes. Tribes living today in the jungles of the Amazon recognize literally hundreds of plants and know many properties of each. To them, botany, as such, has no name and is probably not even recognized as a special branch of "knowledge" at all.
Unfortunately, the more industrialized we become the farther away we move from direct contact with plants, and the less distinct our knowledge of botany grows. Yet everyone comes unconsciously on an amazing amount of botanical knowledge, and few people will fail to recognize a rose, an apple, or an orchid. When our Neolithic ancestors, living in the Middle East about 10,000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer yields the next season the first great step in a new association of plants and humans was taken. Grains were discovered and from them flowed the marvel of agriculture: cultivated crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild- and the accumulated knowledge of tens of thousands of years of experience and intimacy with plants in the wild would begin to fade away.
-
关于万圣节的作文300字合集6篇
无论是在学校还是在社会中,大家都跟作文打过交道吧,作文根据写作时限的不同可以分为限时作文和非限时作文。你写作文时总是无从下笔?以下是小编帮大家整理的万圣节的作文300字8篇,欢迎阅读,希望大家能够喜欢。万圣节的作文300字篇1今天,是万圣节在每年10月31日举办的...
-
关于雨作文15篇(推荐)
在我们平凡的日常里,大家都经常接触到作文吧,作文是通过文字来表达一个主题意义的记叙方法。那么你有了解过作文吗?下面是小编整理的关于雨作文,欢迎大家借鉴与参考,希望对大家有所帮助。关于雨作文1水茫茫,一片淡青色,天阴阴,也显出一片淡青色。远近的楼房被迷蒙的雨...
-
这样的人让我尊敬作文【精选】
在日常学习、工作抑或是生活中,大家都不可避免地会接触到作文吧,作文是从内部言语向外部言语的过渡,即从经过压缩的简要的、自己能明白的语言,向开展的、具有规范语法结构的、能为他人所理解的外部语言形式的转化。你知道作文怎样写才规范吗?以下是小编收集整理的这...
-
关心别人的作文汇编八篇
在学习、工作、生活中,大家都接触过作文吧,作文根据写作时限的不同可以分为限时作文和非限时作文。相信很多朋友都对写作文感到非常苦恼吧,下面是小编为大家整理的关心别人的作文8篇,欢迎大家分享。关心别人的作文篇1朝阳出来了,湖水为它梳装;新月上来了,群星为它做伴...