Question: Q: Scientists perform experiments to test their hypotheses because sometimes the nature of natural universe is what? A:
OPTIONS:
- become obvious
- very obvious
- this obvious
- not obvious
Answer: not obvious

Question: Q: Hyperparathyroidism results from an overproduction of what? A:
OPTIONS:
- inhibited hormone
- tharayroid hormone
- elevated hormone
- parathyroid hormone
Answer: parathyroid hormone

Question: Q: What is the term for animals that have a backbone? A:
OPTIONS:
- carnivores
- invertebrates
- herbivores
- vertebrates
Answer:
vertebrates