Cell Structure and Function

Which scientist first described a live cell using a microscope?

• Robert Brown
• Matthias Schleiden
• Theodore Schwann
• Antonie Von Leeuwenhoek

What is the basic structural and functional unit of all living organisms?

• Tissue
• Organ
• Cell
• Organ system

Which of the following best explains why cell theory is important?

• It divides biology into parts
• It confuses biology
• It eliminates biology
• It unifies biology under one principle

Which of the following is a similarity between unicellular and multicellular organisms?

• Both have exactly one cell
• Both have no nucleus
• Both have no structure
• Both have cells

Which of the following best describes the relationship between cells and life?

• Life exists without cells
• Cells are optional for life
• Cells slow down life
• Cells are essential for life