Which statements about the discovery and nature of cells are correct?
a) Robert Brown discovered the nucleus.
b) Unicellular organisms cannot perform essential life functions independently.
c) Antonie Von Leeuwenhoek first described a non-living cell.
d) Anything less than a complete cell structure ensures independent living.
e) The cell is the fundamental structural and functional unit of all living organisms.
f) Rudolf Virchow discovered the electron microscope.
g) The diversity of life forms is unified by cellular organization.
