(Question)
Q: What two substances do plants give off when they make food? Choices: - water and oil - carbon dioxide and oxygen - chlorophyll and nitrogen - oxygen and water A:
(Answer)
oxygen and water

(Question)
Q: What branch of science holds hope for developing crops with genes that help them withstand harsh conditions? Choices: - physiology - physics - chemistry - biotechnology A:
(Answer)
biotechnology

(Question)
Q: How many pi bonds are found in a triple bond? Choices: - 10 - six - four - two A:
(Answer)
two