Q: Q: What is critical for the formation of hemoglobin? Choices: - salts - proteins - platelets - iron ions A:
A: iron ions

Q: Q: What organelles are known as the "power plants" of the cell? Choices: - plastid - flagella - golgi body - mitochondria A:
A: mitochondria

Q: Q: When two electric contacts come together it completes a what? Choices: - charge - breaker - atom - cricuit A:
A: cricuit

Q: Q: What do tube worms rely on for food? Choices: - fatty microorganisms - lentiviruses microorganisms - sponges microorganisms - chemosynthetic microorganisms A:
A: chemosynthetic microorganisms