It was difficult to distinguish oogonium from spermatogonium according to the shape and size of gonium under light microscope.
在光镜下难以根据性原细胞的形态和大小区分卵原细胞和精原细胞。
2
We cannot be certain that Gonium, pandonina, Eudonna, and Pleodorina represent stages in the evolution of multicellular Volvox from unicellular chlamydomonas.