奇妙的硅藻硅藻是一种藻类植物,一般是单细胞浮游生物,主要存在于水中。它的大小不一,小的只有几个微米,大的可达几个毫米,通常在20微米左右,借助显微镜才能欣赏它的容貌。硅藻的外面由胶质的衣鞘包襄,细胞壁含有果胶和二氧化硅,质地很硬,有很强的抗酸性能。硅藻的奇特构造表现在细胞壁,像肥皂盒一样,它是由套合成盒状的大小两个小壳构成的,大壳称为上壳,小壳称为下壳。壳的边缘由连接带相连称为壳环。壳内有一个细胞核和一些有光合作用的色素颗粒。壳的顶面和底面呈 Wonderful diatoms Diatoms are algae, usually single-celled plankton, found primarily in water. It varies in size, small only a few microns, large up to a few millimeters, usually about 20 microns, with a microscope to appreciate its appearance. Diatoms by the plastic sheath sheath Xiang outside, the cell wall contains pectin and silica, the texture is very hard, has a strong acid resistance. The unique structure of diatoms in the cell wall, like a soap box, which is composed of a box-shaped size of two small shells, the big shell is called the upper shell, the small shell is called the lower shell. The edges of the shell are connected by a connecting strip called the shell ring. Shell has a nucleus and some photosynthetic pigment particles. The top and bottom of the shell appear