Biology Quiz on Cells and Organ Systems

What is the smallest functional unit of life called?

• Organs

• Cells

• Tissues

• Organ systems

Which type of organism consists of only one cell?

• Humans

• Dogs

• Unicellular

• Multicellular

What are groups of similar cells that work together called?

• Organs

• Systems

• Tissues

• Organisms

Which is an example of a tissue?

• Cell tissue

• Muscle tissue

• Digestive system

• Blood cell

What are structures formed from two or more types of tissues working together?

• Organs

• Cells

• Systems

• Tissues

How are organ systems best described?

• Single cells working alone

• Similar tissues working together

• Groups of organs working together

• Individual organs functioning separately

What is the correct order of organization from smallest to largest?

• Tissues → Cells → Organs → Organ Systems

• Cells → Tissues → Organ Systems → Organs

• Cells → Tissues → Organs → Organ Systems

• Organs → Tissues → Cells → Organ Systems

Which statement about multicellular organisms is true?

• They have only one cell

• They have many cells working together

• They don't have tissues

• They don't need organ systems

What happens if one organ system malfunctions?

• Nothing happens to other systems

• Only that system is affected

• It can affect other systems

• The body works better

Which comparison best describes cells in an organism?

• Like workers in an office

• Like tiny factories

• Like buildings in a city

• Like books in a library