作业帮叶绿体,线粒体内为何有DNA,而其他细胞器没有?那其他细胞器怎么解释？
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/09 04:05:18
叶绿体,线粒体内为何有DNA,而其他细胞器没有?那其他细胞器怎么解释？
叶绿体,线粒体内为何有DNA,而其他细胞器没有?
那其他细胞器怎么解释？
叶绿体,线粒体内为何有DNA,而其他细胞器没有?那其他细胞器怎么解释？
这就是原始内共生学说.线粒体起源于好氧性细菌（很可能是接近于立克次体的变形菌门细菌）,叶绿体源于原核生物蓝藻.它们在远古被细胞吞如体内,
由于某种原因没有被分解掉,而是作为细胞器保留了下来.由于它们原来是完整的生物体,所以体内含有遗传物质,并在被吞入后保留了下来.而其它细胞器都是细胞本身含有的,所以没有DNA
这个要说到线粒体和叶绿体的起源
现在说的最多的就是内共生学说
认为线粒体起源于好氧性细菌（很可能是接近于立克次体的变形菌门细菌），而叶绿体源于内共生的光合自养原核生物蓝藻。
因为都是生物来的，所以保留了DNA
叶绿体 线粒体有dna 其它各种细胞 很多都有dna 你的问题问错了
The endosymbiotic theory concerns the origins of mitochondria and plastids (e.g. chloroplasts), which are organelles of eukaryotic cells. According to this theory, mitochondria and chloroplast have th...
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The endosymbiotic theory concerns the origins of mitochondria and plastids (e.g. chloroplasts), which are organelles of eukaryotic cells. According to this theory, mitochondria and chloroplast have thought to be evolved earlier. they used to be separate living species which had their own dna to synthesize their own food and energy, they were later on engulfed by other larger living species (thought to be the cell) and now are the intercellular organelles in a cell . Therefore, mitochondria and chloroplast have their own DNA. But the other organelles are not evolved in the same way, so they do not have their own DNA.
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中心粒中有DNA，可能与有丝分裂有关。