1 cm 1 mm 100 um 10 um 1 um 100 nm 10 nm 1 nm 0.1 nm 光学显微镜 电子显微镜 扫描探针 几种显微镜观察样品大小的范围
几种显微镜观察样品大小的范围
6. Two fundamentally different classes of cells: Prokaryotes and eukaryotes A. Prokaryotic and eukaryotic cells are distinguished by the size and the types of internal structures, or organelles, especially if there is nuclear envelope Bacteria are prokaryotes they arose 3. 5 billion years ago Protists, fungi, plants, and animals are eukaryotes. The first eukaryotes arose 1.5 billion years ago
6. Two fundamentally different classes of cells: Prokaryotes and eukaryotes A. Prokaryotic and eukaryotic cells are distinguished by the size and the types of internal structures, or organelles, especially if there is nuclear envelope. Bacteria are prokaryotes, they arose 3.5 billion years ago; Protists, fungi, plants, and animals are eukaryotes. The first eukaryotes arose 1.5 billion years ago