input: OPTIONS:
- hemoglobin
- insulin
- vasopressin
- oxytocin Now, answer this question: Q: What is continually released during childbirth through a positive feedback mechanism and prompts uterine contractions to fetal head toward the cervix? A:
A:
output: oxytocin

input: OPTIONS:
- oxygen
- hydrogen
- carbon
- energy Now, answer this question: Q: Because glucose is a major cellular fuel, starch represents a supply of what? A:
A:
output: energy

input: OPTIONS:
- microbes
- parasites
- radiation
- mutations Now, answer this question: Q: What are the key to species evolving? A:
A:
output:
mutations