type genus of the Volvocaceae; minute pale green flagellates occurring in tiny spherical colonies; minute flagella rotate the colony about an axis
例句
用作名词 (n.)
When that happened, individual cells could turn their reproductive capacity on or off according to the function they served in Volvox's body. 这个突变让团藻的各个细胞根据自身的角色打开或关闭自己的生殖功能。