Q: Gas lines should be made of what so they do not rupture? Choices: - typically material - Hard material - adjustment material - flexible material A:
flexible material

(Question)
Q: What is the most prevalent gas in the atmosphere, but not the most vital for life? Choices: - carbon dioxide - oxygen - argon - nitrogen A:
(Answer)
nitrogen

Ques: Q: Whether the organism is a bacterium, plant, or animal, all living things access energy by breaking down these? Choices: - lipid molecules - protein molecules - oxygen molecules - carbohydrate molecules A:
Ans: carbohydrate molecules

(Q).
Q: In mammals, hair or fur help conserve bodily what? Choices: - food - energy - water - heat A:
(A).
heat

Ques:Q: What type of behavior is frogs croaking or deer clashing antlers an example of? Choices: - instincts - learned behavior - mating - courtship A:

Ans:courtship

Question: Q: Mercury and lead, which was once widely used in paint and gasoline, are examples of what type of metals? Choices: - gaseous heavy metals - alloys - sulfuric heavy metals - toxic heavy metals A:
Answer:
toxic heavy metals