Then I realize that the bond between members of a chimp family is as strong as in a human family.

1. as strong as  第一个as 为副词第二个as 为连词对吗？

——正确。

2. 第二个as 做连词的时候一定是连接从句吗？如果是从句 那这句话第二个as 省略的内容是什么呢？

—— 顾名思义，从属连词就是引导从句的，从句不完整是省略的结果。从句省略成分是常态，例如：

Once (it is) heated, the amber can be made into any shape.

Mary often helped her classmates when (she was) free. 

While (you were) walking the dog, you were careless. 

John won't come to your party unless (he is) invited. 

He opened the drawer，as if (he was) in search of something important. 

I know you better than (I know) him. 

She can dance ballet just as wonderfully as you (dance). 

原句在第二个 as 后省略了the bond between members 和 is。补充完整为：

Then I realize that the bond between members of a chimp family is as strong as the bond between members in a human family is.

【说明】语言的精髓在于凝练，啰嗦是语言的大忌。网友问的句子，省略是必要的。