Levels of Organization in Biology

What is the smallest unit of matter that occupies space and has mass?

• Atom

• Molecule

• Element

• Cell

Which subatomic particle is positively charged?

• Photon

• Proton

• Neutron

• Electron

What is formed when two or more elements bond together?

• Atom

• Tissue

• Molecule

• Cell

Which of the following is an example of a macromolecule?

• Oxygen

• Carbon

• Water

• Lipid

What is the term for a group of organs that work together to perform a specific function?

• Organ System

• Tissue

• Community

• Population