(Q).
Q: What are the smallest type of blood vessels? Choices: - viens - arteries - neurons - capillaries A:
(A).
capillaries

(Q).
Q: Avoiding carcinogens helps lower the risk of what? Choices: - radiation - colds and flu - sunburn - cancer A:
(A).
cancer

(Q).
Q: How many pathways do plants have for carbon fixation? Choices: - two - five - eleven - three A:
(A).
three