Portions of Stentor lacking either macronucleus or cell membrane only survive for a short time.
缺乏大核或细胞膜的 Stentor 部分只能存活很短的时间。
单词 | Macronuclei |
释义 |
Macronuclei
原声例句
微观旅途 Portions of Stentor lacking either macronucleus or cell membrane only survive for a short time. 缺乏大核或细胞膜的 Stentor 部分只能存活很短的时间。 微观旅途 The macronuclei of both cells then dissolves into the cytoplasm. 然后两个细胞的大核溶解到细胞质中。 微观旅途 The cut piece must contain at least part of the macronucleus and a piece of the cell membrane. 切片必须至少包含部分大核和一块细胞膜。 微观旅途 The macronucleus controls the non-reproductive cell functions, like eating, movement, and digestion and the micronucleus is necessary for reproduction. 大核控制非生殖细胞功能,如进食、运动和消化, 而微核是繁殖所必需的。 微观旅途 Even a tiny fragment less than one-one hundredth the size of Stentor coeruleus can reconstitute itself in this way if both the cell membrane and the macronucleus are present. 如果细胞膜和大核都存在,那么即使是小于蓝展螺的百分之一大小的微小碎片也可以通过这种方式自我重组。
英语百科
Macronucleus(重定向自Macronuclei)
A macronucleus (formerly also meganucleus) is the larger type of nucleus in ciliates. Macronuclei are polyploid and undergo direct division without mitosis. It controls the non-reproductive cell functions, such as metabolism. During conjugation, the macronucleus disintegrates, and a new macronucleus is formed by karyogamy of the micronuclei. The macronucleus contains hundreds of chromosomes, each present in many copies. The macronucleus lacks a mechanism to precisely partition this complex genome equally during nuclear division; thus, how the cell manages to maintain a balanced genome after generations of divisions is unknown. |
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