Line 1: *Shivering occurs when many muscles contract a little bit all at once. Another response to cold is shivering. A response to cold occurs when many muscles contract a little at once.*
*(B)*
Line 2: *A response to what occurs when many muscles contract a little at once?
Options:
- (A) heat
- (B) cold
- (C) sweat
- (D) pain
- (E) forces
- (F) stress
- (G) comfort
- (H) motion*

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: *Plasma cells are activated B cells that secrete antibodies. Plasma Cells Plasma Cells Plasma cells are the mature form of B-lymphocytes. Mature forms of B-lymphocytes secrete antibodies.*
*(G)*
Line 2: *The mature form of what kind of cell secretes antibodies?
Options:
- (A) more abundant
- (B) it needs them
- (C) positive
- (D) graptolites
- (E) A Greek letter
- (F) barnacles
- (G) B-lymphocytes
- (H) homogenous*

Logic of a solution: *Constriction occurs when the muscular walls of blood vessels contract. Arteries and veins are blood vessels. Constriction happens when the muscular walls of arteries and veins contract.*
*(G)*
The original question: *What happens when muscular walls of arteries and veins contract?
Options:
- (A) connection
- (B) It expands
- (C) Dehydration
- (D) construction
- (E) forces
- (F) massive damage
- (G) constriction
- (H) contraction*

Line 1: *Fish have a centralized nervous system with a brain. Sharks are a type of fish. Sharks have a centralized nervous system with a brain.*
*(D)*
Line 2: *What has a centralized nervous system with a brain?
Options:
- (A) Man
- (B) Birds
- (C) leeches
- (D) shark
- (E) evergreens
- (F) salmon
- (G) worms
- (H) pan*

Line 1: *Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production is increased when many muscles contract a little bit, all at once.*
*(B)*
Line 2:
*When many muscles contract a little bit, simultaenous, it produces:
Options:
- (A) forces
- (B) heat
- (C) cold blooded
- (D) sweat
- (E) electrical energy
- (F) Energy
- (G) pain
- (H) thermal displacement*