they are identified by using oil immersion lens,the microtome technique and new fixes and dyes greatly improved microscoping
For animals - nucleus, cell membrane, cytoplasm.For plants - nucleus, cell membrane, cytoplasm, chloroplasts and cell wall.
The component are observed using a microscope when technology was advanced enough. The components of a cell are the nucleus, vacuole, cell membrane, cytoplasm. Plant cells also contain a cell wall and chloroplast.Lucas Chia
The components in the cells are identified by a microscope after the development of Cell theory and the components are: Nucleus,cytoplasm,cell membrane, chloroplast,cell wall.