some organisms such as amoeba that are unicellular and one cell
organism ,this unicellular one cell organism can perform all life
organism have many cells which can perform many functions.This is why it is
called structural unit of life.
living cell has the capacity to perform certain basic function s that are
chatacterrstic of all living forms.There is a division of labour in
multicellular organisms such as human being .This means thatdifferent parts of
the human body perform different funtion.Each cell has got certain specific
.This is why it is called functional unit of life.