Q: Arteries in the body are able to carry what?
Options:
- (A) saliva
- (B) breathe
- (C) water
- (D) Air
- (E) oxygen
- (F) blood
- (G) veins
- (H) liquid
A: So, my chain of thought: Veins generally carry deoxygenated blood. Arteries and veins are blood vessels. Arteries carry blood. The answer is (F).

Q: The total mass of organisms in an environmental stage is called what?
Options:
- (A) food pyramid
- (B) extinction
- (C) ecological pyramid
- (D) food chain
- (E) vegetation
- (F) food
- (G) ligt
- (H) biomass
A: So, my chain of thought: Biomass is the total mass of organisms at a trophic level. Each stage is a trophic level. Biomass is the total mass of organisms in an environmental stage. The answer is (H).

Q: Some agents that infect cells live in what state inside the body?
Options:
- (A) solid
- (B) conscious
- (C) expelled
- (D) bacteria
- (E) infected
- (F) dormant
- (G) cellular
- (H) protected
A:
So, my chain of thought: Some viruses live in a dormant state inside the body. Viruses Viruses are agents that infect cells, yet lack many of the characteristics of life. Some agents that infect cells live in a dormant state inside the body. The answer is (F).