Problem: OPTIONS:
- anemia
- lung cancer
- stomach cancer
- leukemia
Q: Q: What is the most common type of cancer developed in children? A:
Answer: leukemia

Problem:OPTIONS:
- capital resources
- renewable energy
- human resources
- natural resource

Q: What type of resource is limited in supply and cannot be replaced except over millions of years? A:
****
A: natural resource

Q: Respiratory distress syndrome results from insufficient production of what? A:
OPTIONS:
- carbon dioxide
- alveoli
- lung tissue
- pulmonary surfactant
pulmonary surfactant

Q: Roots grow in length and width from the primary and secondary what? A:
OPTIONS:
- pistil
- frill
- leaf
- meristem

Answer: meristem

Question: Q: What laws regulate radiation doses to which people can be exposed? A:
OPTIONS:
- medical regulation laws
- voltage protection laws
- dose regulation laws
- radiation protection laws
Answer: radiation protection laws

input: OPTIONS:
- primordial structures
- parasitic structures
- adaptations
- vestigial structures Now, answer this question: Q: Structures like the human tail bone and whale pelvis are called what? A:
A:
output:
vestigial structures