1. Which waste gas do humans exhale as a product of respiration?

2. What is the tube that carries urine from the kidney to the urinary bladder called?

3. In plants, where is excess sugar stored as a waste product that is later used as food?

4. What type of blood does the right ventricle of the heart pump?

5. Which organ in humans produces urea by breaking down excess amino acids?

6. What is the process of removing waste products from the body called?

7. Which of the following is NOT a function of blood in the human body?

8. What do plants store as waste products in their leaves, bark, and fruits that are often useful to humans?

9. What is the largest artery in the human body called?

10. In single-celled animals like Amoeba, how are waste products removed from the body?