We may very well say that human

We may very well say that human language is biologically, or more exactly, n______，based.
【正确答案】：neurologically(P210)解析:就目前所知,人类是唯一的大脑左半球的某个区域明显大于右半球相对区域的生物体。这种现象使人们相信,人类的语言是生物性的——或者更准确地讲——是以神经学为基础的。