李白诗云：“君不见，高堂明镜悲白发，朝如青丝暮成雪．”从细胞学的角度分析，这个过程中不会出现下列哪项（　　）

2010年11月1日零时，我国进行了新中国成立以来的第六次全国人口普查，此次普查的主要目的是查清十年来我国人口在数量、结构、分布和居住环境等方面的变化情况，为实施可持续发展战略提供科学准确的统计信息支持。据此读有关材料和图，回答问题。

材料一  中国1950年、1980年、2010年、2050年（预计）人口金字塔结构图。

材料二  国家统计局最新数据显示，2010年末我国总人口为13.397亿，其中超过60岁的老年人口为1.776亿，约占总人口的13.26％。城乡老年空巢家庭比例不断上升，城市老年空巢家庭的比例已达到49.7％，农村老年空巢家庭的比例已达到38.3％，家庭养老功能不断弱化。未来五年将是人口老龄化加速发展期，将会呈现出老龄化、高龄化、空巢化加速发展的新特性。

阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空格处填入一个适当的词或使用括号中词语的正确形式填空。

      We can use cameras to take photos. Can cats do it? Believe it or not, there is a cat that can use cameras ____ (take) photos. Read on and find out more information.

      The name ____ the cat is Cooper. He is a five-year-old cat and he ____ (live) in Seattle, America. He is very special because he is the only cat who has his own camera.

      At the ____ (begin), Cooper's owner puts a camera on his neck. He just wants to learn about the ____ (cat) life from the camera.

      When Copper ____ (bring) the camera home at the end of the first day, the photos that he took surprised his owner. Many ____ (beauty) pictures filled Cooper's day.

      It is ____ (real) interesting to be able to see the world from a cat's eye. Cooper's owner says that these photos let people see into a cat's world, ____ also help them to learn more about their pets.

       Cooper now has more than 12,000 fans on ____ Internet and has even made TV shows in America.