Prokaryotes lack organelles such as nucleoli, mitochondria, plastids, Golgi apparatus, and do not exhibit cyclosis.
原核生物无，如核仁、粒、质、基等，不出现质环流。
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In prophase 2, we see the disappearance of the nucleoli and the nuclear envelope again as well as the shortening and thickening of the chromatids.
在前期 2，我们看到膜消失，染色单体变短变厚。
Generally speaking, malignant cells are irregularly-shaped with darkly staining nuclei, enlarged nucleoli, and produce abnormal keratin that look like pearls - so they're called keratin pearls.
般来说，恶性肿瘤细胞形态各异且细胞深染，伴有增仁，还会产生珍珠样异常角质——称作角化珠。
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详细解释
，如核仁、
粒
、质
基
普
膜消失，染色单体变短变厚。
般来说，恶性肿瘤细胞形态各异且细胞
