The evolutionary process culminating in man was finally completed about 35,000 years ago w

ith the appearance of Homo Sapiens, or "thinking man". (1)_____ in broadest perspective, this represents the second major turning (2)_____ in the course of (3)_____ on this planet. The first occurred when life (4)_____ out of inorganic matter. After that momentous (5)_____, all living forms evolved by adapting (6)_____ their environment, as was evident during the climate turmoil of the Pleistocene. But with the (7)_____ of man, the evolutionary process was (8)_____. No longer did genes adapt to environment. Instead, man adapted by changing the environment to (9)_____ his genes. Today, a third (10)_____ turning point appears (11)_____, as man's growing knowledge of the structure and function of genes may soon enable him to (12)_____ his genes as well as his environment.

Man, and only man, has been able to create a made-to-order environment, or culture, as it is called. The reason is (13)_____ only man can symbolize, or (14)_____ things and concepts divorced from here-and-now reality. Only he laughs, and only he knows that he will die. Only he has wondered (15)_____ the universe and its origins, about his place in it and in the hereafter.

With these unique and revolutionizing abilities, man has been able to (16)_____ with his environment without alteration. His culture in the new no biological way of having fur in the Arctic, water storage in the desert, and fins in the water. More concretely, culture (17)_____ tools, clothing, ornaments, institutions, language, art forms, and religious beliefs and (18)_____. All these have served to adapt man to his physical environment and to his fellowman. Indeed, story of man is simply the story of a (19)_____ of cultures that he has created, form. his Paleolithic (20)_____ to the present day.

A．Reviewed

B．Viewed

C．Probed

D．Prospected