For some behaviors in animals，there is little proof for strong genetic（基因的）determination. Not only are there many environmental and historical changes in behavior patterns,  (56)  we also know that some of them are passed on from one generation to the  (57) .They are “cultural”. The term “culture”here ( 58)social traditions. One (59) of animal culture is the well-studied food-handling behavior of the group of Japanese monkeys living ( 60 ) the small,wooded island of Koshima.These monkeys ( 61 ) to live in the forests,but Japanese researchers came and started to feed them by ( 62 ) sweet potatoes on the sandy beach. Soon, the monkeys began to leave the forests and ( 63 ) the sweet potatoes on the beach.About a year  64  the feeding started,a young female monkey was ( 65 ) to wash the potatoes in a nearby river. She actively and successfully ( 66 ) the sand on them. Within the next few years, potato-washing spread ( 67)  the group, and the practice was carried ( 68 ) from the river to the sea.( 69 ) potato-washing in the sea,several other habits ( 70 ) with feeding on the sandy beach are now well established in the monkey group. The habits are passed from mothers and other group members to the babies. Japanese monkeys are not the only animals to have ( 71 ) their behaviors.In many cities and towns,European red foxes have successfully changed some of their behaviors in (72 ) to get used to their new city life over a short period of time. Obviously, this is not the ( 73 ) of the selection of genes.The same is ( 74 ) of common racoons（浣熊）in America.The course of the evolution（进化）of behavior cannot be adequately described and understood without (75 ) "culture"as an active factor. The cultural factor affects the selection of genes.