…Euglena has chloroplasts and lives an autotrophic life in normal environments, but when cultivated in the dark, it does not produce chloroplasts and continues to live a heterotrophic life when given nutrients. Furthermore, even among the same autotrophs, there are photoautotrophs that have chlorophyll and assimilate carbon dioxide, and chemoautotrophs such as some bacteria that assimilate chemically, and although they may appear similar, it is difficult to consider them to be of the same lineage. The presence or absence of a cell wall is one of the differences between animals and plants, but many unicellular algae do not have a cell wall. … *Some of the terminology that refers to "chemical autotrophy" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ミドリムシはふつうの環境では葉緑体をもっていて独立栄養の生活をしているが,暗所で培養すると葉緑体をつくらず,養分を与えられると従属栄養の生活を続ける。さらに,同じ独立栄養でも,葉緑素をもっていて炭酸同化をする光独立栄養のほか,一部の細菌類のような化学同化を行うものの化学的独立栄養などは,見かけ上の類似はあっても,系統的に同質のものとみなすのは困難である。 細胞壁の有無は動植物の差の一つであるが,単細胞藻類には細胞壁をもたないものが多い。… ※「化学的独立栄養」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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