1. What is the name of the curved, transparent front part of the eye that helps focus light onto the retina?

• ✓ Cornea
• Iris
• Pupil
• Lens

2. Which of the following is the process by which organisms produce offspring that are genetically identical to themselves?

• Sexual reproduction
• ✓ Asexual reproduction
• Mitosis
• Meiosis

3. What is the term for the smallest unit of a chemical element that retains its properties?

• Molecule
• ✓ Atom
• Electron
• Ion

4. In the Periodic Table, which element has the atomic number 6 and is the basis of all organic life?

• Oxygen
• Nitrogen
• ✓ Carbon
• Hydrogen

5. What is the name of the phenomenon where organisms develop traits that make them better suited to their environment over many generations through natural selection?

• ✓ Adaptation
• Mutation
• Genetic drift
• Gene flow