About Lesson
Cell
- Size ranges from 0.1µm to 5 µm (bacteria) or 10-50 µm in animal cells.
- Cells are again divided into prokaryotes (having single nucleus) or eukaryotic ( having nucleus and sub-cellular organelles).
Prokaryotic cell
- Size ranges from 0.1-10 µm.
- Spherical (Cocci), rod like (bacilli) or helically coiled (Spirilla) shaped.
- Two separate groups i.e. Eubacteria and Archaebacteria.
- Eubacteria includes Gram positive, Gram negative and Cyanobacteria (Photosynthetic BGA).