Single – Celled and
Multi - celled Organisms
Mycoplasma – smallest
organism discovered.
Multicellular – organism made
up of two or more cells.
Ex. Plants or animals
Unicellular – organisms made
up of only a single cell.
Mycoplasma is an example.
Most microscopic organisms
(micro organisms) are
unicellular.
Unicellular organism is complex,
it must have all six
Characteristics of Life.
Multicellular organism has several
specialized cells which depend on
each other for survival.
Common Unicellular
Organisms
Amoeba – live in water. Move
and trap food by using
projections called
Pseudopods.
Pg 114 – Figure 2.23
Draw and Label
1
Paramecium – live in water. Move
and trap food in hair like
structures called Cilia. The cilia
move back and forth like oars on
a boat.
Pg 114 Figure 2.24
Draw and Label
2