Page 88 - Science Course 1 (Book 1)

Mo3-L4a: What are Unicellular and Multicellular Organisms?

Multicellular organisms usually have many organ SUMMARY
systems that work together to carry out all the jobs What are Unicellular and Multicellular Organisms?
needed for the survival of the organism.
A unicellular organism carries out all the
activities necessary for survival within one cell.

Cells become specialized in structure and
function during cell differentiation.

Organs are groups of different tissues that work
together to perform a job.

Key Concept

What are Unicellular and Multicellular
Organisms?
How does cell differentiation lead to the
organization within a multicellular
organism?
Atom

Molecule

Organelle

Cell Tissue

System Organ

Organism

81