Q: Female monotremes lack a uterus and vagina. instead they have what? A:

OPTIONS:
- endometrium
- placenta
- urethra
- cloaca

Answer: cloaca

Problem: OPTIONS:
- cool front
- dry front
- rough front
- warm front
Q: Q: What results when a warm air mass runs into a cold air mass? A:
Answer: warm front

Problem:OPTIONS:
- reversible reaction
- physical reaction
- toxic reaction
- chemical reaction

Q: What type of reaction is a process in which some substances, called reactants, change into different substances, called products? A:
****
A: chemical reaction

Q: What is at the center of our solar system? A:
OPTIONS:
- the moon
- earth
- the Kuiper Belt
- the sun
the sun

Q: How do bipedal creatures walk? A:
OPTIONS:
- on twelve legs
- on six legs
- on four legs
- on two legs

Answer: on two legs

input with options: Q: What does a healthy immune system fight off? A:
OPTIONS:
- microorganisms and other dieases
- respiratory and other dieases
- bacteria and viruses
- infections and other dieases
output:
infections and other dieases