Complex sentence: A Micro-organism is too small to be seen with the naked eye Micro-organisms and was first directly observed by Anton van Leeuwenhoek, who is considered the father of microbiology.
Split into simpler sentences: A Micro-organism is too small to be seen with the naked eye. Micro-organisms were first directly observed by Anton van Leeuwenhoek, who is considered the father of microbiology.