*Question*
Q: What are the three stages of water? Choices: - ice, rock, sky - vapor, earth, internal - liquid, underground, frozen - ice, liquid, vapor A:
**Answer**
ice, liquid, vapor

*Question*
Q: Which veins return oxygen-rich blood from the lungs to the heart? Choices: - jugular - varicose - respiratory - pulmonary A:
**Answer**
pulmonary

*Question*
Q: When does the diploid zygote form? Choices: - never - before the pollen tube - before the haploid zygote - after the pollen tube A:
**Answer**
after the pollen tube

*Question*
Q: Opposite charges attract and like charges do what? Choices: - nothing - rebound - impede - repulse A:
**Answer**
repulse