Q: What is the smallest unit of a chemical element called? A:
OPTIONS:
- cell
- droplet
- nucleus
- atom

Answer: atom

Q: What is the name for the disease in which cells divide out of control? A:
OPTIONS:
- diabetes
- mutation
- angina
- cancer

Answer: cancer

Q: What does the clitellum secrete, while the sperm received are stored temporarily? A:
OPTIONS:
- pathogen of mucus
- discharge of mucus
- amoeba of mucus
- cocoon of mucus

Answer:
cocoon of mucus