Line 1: *Head hair is especially important in preventing heat loss from the body. Hypothermia Loss of body heat caused by exposure is called Hypothermia. Head hair is especially important in preventing hypothermia.*
*(D)*
Line 2: *Something that helps prevent hypothermia:
Options:
- (A) dehydration
- (B) freezing
- (C) water
- (D) head hair
- (E) cold
- (F) electricity
- (G) Exfoliation
- (H) sweating*

Logic of a solution: *Chemical bonds form when substances react with one another. All substances are composed of molecules. Chemical bonds form when molecules react with one another.*
*(C)*
The original question: *What forms when molecules react with one another?
Options:
- (A) Chemical energy
- (B) substrates
- (C) chemical bonds
- (D) living things
- (E) Organic compounds
- (F) Energy.
- (G) new elements
- (H) flow of electrons*

Line 1: *Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use chemicals to mark their territory.*
*(B)*
Line 2: *What do dogs use to mark their territory?
Options:
- (A) water
- (B) Chemicals
- (C) layers of fat
- (D) food
- (E) Animal fur
- (F) heat energy
- (G) Scratches
- (H) heat produced*

Logic of a solution: *Slime molds are fungus-like protists commonly found on rotting logs and compost. Once the trees are cut, they become logs . Slime molds are fungus-like protists commonly found on rotting trees and compost.*
*(G)*
The original question: *Where are slime molds found?
Options:
- (A) flowers
- (B) loose dirt
- (C) animals
- (D) leaves
- (E) loose soil
- (F) swamp vegetation
- (G) rotting trees
- (H) an organism's body*

Line 1: *Carbon cycles quickly between organisms and the atmosphere. Deforestation also disrupts the Carbon Cycle. Deforestation disrupts the cycle between organisms and the atmosphere.*
*(H)*
Line 2: *What disrupts the cycle between organisms and the atmosphere?
Options:
- (A) burning coal
- (B) Sulfur dioxide
- (C) replanting forests
- (D) solar system
- (E) Greenhouse gasses
- (F) chlorofluorocarbons
- (G) life cycle
- (H) deforestation*

Line 1: *Amphibians have a relatively complex circulatory system with a three-chambered heart. Frogs, toads and salamanders are amphibians. Frogs, toads and salamanders have a relatively complex circulatory system with a three-chambered heart.*
*(G)*
Line 2:
*What sort of circulatory system do frogs, toads, and salamanders share?
Options:
- (A) live birth
- (B) It helps them survive
- (C) matter vibrating
- (D) two-chambered heart
- (E) Veins and arteries.
- (F) biological diversity
- (G) three-chambered heart
- (H) four-chambered heart*