Question: Q: The testes produce what hormone? Choices: - dopamine - insulin - estrogen - testosterone A:
Answer: testosterone

Question: Q: What type of blood does the right side of the heart collect and then pump to the lungs? Choices: - nitrogen-rich blood - oxygen-rich blood - nitrogen-poor blood - oxygen-poor blood A:
Answer: oxygen-poor blood

Question: Q: What type of air do plants take in and use? Choices: - oxygen - liquid dioxide - carbon - carbon dioxide A:
Answer:
carbon dioxide