Levels of Organization in Multicellular Life

What is the main difference between unicellular and multicellular organisms?

• Unicellular organisms have multiple cells.

• Multicellular organisms have only one cell.

• Unicellular organisms contain everything they need within one cell.

• Multicellular organisms do not grow.

What happens to starter cells as multicellular organisms grow?

• They merge into one large cell.

• They differentiate into many different types of cells.

• They die off.

• They remain the same.

Which type of cell is responsible for transferring messages in the form of electrical energy?

• Red blood cells

• Muscle cells

• Nerve cells

• Epithelial cells

What is the primary function of red blood cells?

• To protect the organism from outside sources

• To transport oxygen to other cells and carbon dioxide to the lungs

• To send electrical signals

• To help the organism move

What do groups of similar cells form?

• Organisms

• Organs

• Organ systems

• Tissues

What is the main function of epithelial tissue?

• To help the organism move

• To send electrical signals

• To cover and protect other tissues

• To transport oxygen

What is the purpose of the stomach?

• To control body functions

• To digest food and send it to the small intestine

• To bring oxygen into the body

• To pump blood

Which organ is responsible for pumping blood throughout the organism?

• Lungs

• Brain

• Heart

• Stomach

What is the role of the cardiovascular system?

• To help the organism move

• To break down food into nutrients

• To provide a frame to support the body

• To pump blood carrying nutrients and gases

What happens when one system in a multicellular organism fails to function properly?

• The organism could die

• The organism grows faster

• The organism becomes stronger

• The organism remains unaffected