Q: What is the main organ required for respiration in mammals? A:
OPTIONS:
- the diaphragm
- the heart
- the brain
- the lungs

Answer: the lungs

Q: Terminal pods are located at the end of what? A:
OPTIONS:
- fruits
- leaves
- spines
- stems

Answer: stems

Q: What happens when the kidneys cannot remove wastes from the blood? A:
OPTIONS:
- tissue failure
- intestinal failure
- choanocyte failure
- kidney failure

Answer:
kidney failure