原核生物

Prokaryotes, such as bacteria, lack a true nucleus and membrane-bound organelles.
原核生物，如细菌，没有真正的细胞核和膜包被的细胞器。
The prokaryotic cell is much simpler in structure than the eukaryotic cell.
原核细胞在结构上比真核细胞要简单得多。
Photosynthesis is carried out by certain types of prokaryotes called cyanobacteria.
光合作用由某些被称为蓝藻的原核生物进行。
Antibiotics are effective against many pathogenic prokaryotes that cause infections.
抗生素对许多引起感染的病原性原核生物有效。
In prokaryotes, genetic material is usually circular and located in the cytoplasm.
在原核生物中，遗传物质通常是环状并位于细胞质中。
The cell wall of prokaryotes serves as a protective barrier against environmental stress.
原核生物的细胞壁起到了对抗环境压力的保护屏障作用。
Many prokaryotes form spores to survive extreme conditions like heat or drought.
许多原核生物形成芽孢以在高温或干旱等极端条件下存活。
Horizontal gene transfer is common among prokaryotes and contributes to their evolution.
水平基因转移在原核生物之间很常见，并且对其进化起着重要作用。
Prokaryotes play a critical role in nutrient cycling and decomposition processes in ecosystems.
原核生物在生态系统中的营养循环和分解过程中发挥着关键作用。
Fossil evidence suggests that the first life forms on Earth were prokaryotes, dating back more than 3.5 billion years.
化石证据表明地球上最早的生命形式是原核生物，其历史可以追溯到超过35亿年前。