1. Which blood cells carry oxygen? (Q98) 2. Which vitamin is produced when skin is exposed to sunlight? 3. Which planet is known as the Red Planet? (Q7) 4. Which metal is liquid at room temperature? (Q99) 5. Which metal is liquid at room temperature? (Q64) 6. Which blood cells carry oxygen? (Q78) 7. Which gas do plants absorb in photosynthesis? (Q20) 8. Which blood cells carry oxygen? (Q63) 9. Which gas do plants absorb in photosynthesis? (Q65) 10. Which planet is known as the Red Planet? (Q27)