Q: Batteries produce voltage through what type of reaction? Choices: - magnetic - radiation - thermal - chemical A:
chemical

Q: What organs have tiny tubes leading to and from elastic air sacs that improve airflow and oxygen uptake? Choices: - ovaries - apendix - liver - lungs A:
lungs

Q: How long ago did the ancestors of mammals evolve? Choices: - 10 million - 50,900 million years - 100 million - 300 million years A:
300 million years

Q: Commensalism, mutualism, and parasitism are known as what type of relationships? Choices: - simple - peculiar - various - symbiotic A:
symbiotic