Cells are the tiny,basic building blocks from which all creatures are made up.
问题描述：
Cells are the tiny,basic building blocks from which all creatures are made up.
答
细胞是极小的,组成所有生物的基本构造单元
basic building blocks 这句话为前面cells的同位语结构
from which all creatures are made up 为basic building blocks 的定语从句,which为关系代词,可以调整一下,理解起来更清楚,basic building blocks which all creatures are made up fromfrom放在句末是否改变原文意思？不改变啊，都是正确的结构，如果放在句末，which可以用that来代替，因为that前不能有介词，但which 可以。如果觉得我的回答还不错，可以选择为满意答案喔，呵呵