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Há 1 dia · Eukaryotes are organisms that range from microscopic single cells, such as picozoans under 3 micrometres across, [7] to animals like the blue whale, weighing up to 190 tonnes and measuring up to 33.6 metres (110 ft) long, [8] or plants like the coast redwood, up to 120 metres (390 ft) tall. [9]
Há 2 dias · Eukaryotic genomes. In a typical human cell, the genome is contained in 22 pairs of autosomes, two sex chromosomes (the female and male variants shown at bottom right), as well as the mitochondrial genome (shown to scale as "MT" at bottom left). Eukaryotic genomes are composed of one or more linear DNA chromosomes.
Há 2 dias · Euglena, a single-celled eukaryote that can both move and photosynthesize. Eukaryotes are hypothesized to have split from archaea, which was followed by their endosymbioses with bacteria (or symbiogenesis) that gave rise to mitochondria and chloroplasts, both of which are now part of modern-day eukaryotic cells.
Há 2 dias · 真核生物 （しんかくせいぶつ、 羅: Eukaryota 、 英: eukaryotes ）は、生物学の ドメイン Eukaryota / Eukarya を構成し、 細胞 の中に 核 と呼ばれる 細胞小器官 を持つ 生物 である。 すべての 動物 、 植物 、 菌類 、そして多くの 単細胞生物 は真核生物である。 真核生物は、 原核生物 の2つの分類群すなわち 細菌 と 古細菌 と並び、 生命体 を構成する主要な分類群の一つである。 真核生物は原核生物に比べ個体数としては少ないが、一般的にはるかに大きいので、その集団的な地球規模での バイオマス ははるかに大きい。 真核生物は、 アスガルド古細菌 の中の一群から出現したと見られる [5] 。
Há 2 dias · Cyanobacteria are globally widespread photosynthetic prokaryotes and are major contributors to global biogeochemical cycles. [25] They are the only oxygenic photosynthetic prokaryotes, and prosper in diverse and extreme habitats. [26]
Há 3 dias · Archaea were discovered in volcanic hot springs. Pictured here is Grand Prismatic Spring of Yellowstone National Park. For much of the 20th century, prokaryotes were regarded as a single group of organisms and classified based on their biochemistry, morphology and metabolism.
Há 6 dias · t. e. Marine prokaryotes are marine bacteria and marine archaea. They are defined by their habitat as prokaryotes that live in marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. All cellular life forms can be divided into prokaryotes and eukaryotes.
