Logic of a solution: *Animals are a kingdom of multicellular eukaryotes. Invertebrates make up the majority of the animal Kingdome. Invertebrates make up the majority of multicellular eukaryotes.*
*(G)*
The original question: *What group makes up the majority of multicellular eukaryotes?
Options:
- (A) Most plants
- (B) solid, liquid, gas
- (C) orchids
- (D) Plant reproduction
- (E) Veins and arteries.
- (F) passenger pigeons
- (G) Invertebrates
- (H) insects*

Line 1: *Mutations are essential for evolution to occur. When that occurs, several things happen. Mutations are essential for evolution happen.*
*(B)*
Line 2: *Mutations are what to evolution?
Options:
- (A) Plants growth
- (B) essential
- (C) optional
- (D) competition
- (E) dangerous
- (F) non essential
- (G) voluntary
- (H) allow growth*

Logic of a solution: *Viruses are not cells. Viruses Viruses are the simplest organisms known. Cells are not the simplest organisms.*
*(G)*
The original question: *Are there organisms simpler than cells.
Options:
- (A) DNA
- (B) plankton
- (C) tiny
- (D) algae
- (E) amoeba
- (F) RNA
- (G) yes
- (H) food*

Line 1: *Producers use energy and inorganic molecules to make food. Minerals are inorganic substances. Producers use energy and minerals to make food.*
*(D)*
Line 2: *What use energy and minerals to make food?
Options:
- (A) trees
- (B) plant life
- (C) humans
- (D) producers
- (E) bears
- (F) elephants
- (G) Most plants
- (H) ferns*

Logic of a solution: *Sex hormones are chemical messengers that control sexual development and reproduction. Chemical messengers carry signals from one nerve branch to another. Sex hormones carry signals that control sexual development and reproduction.*
*(A)*
The original question: * _carry signals that control sexual development and reproduction
Options:
- (A) sex hormones
- (B) electricity
- (C) nucleic acid
- (D) Most plants
- (E) animals
- (F) genes
- (G) dendrites
- (H) photons*

Logic of a solution: *Head hair is especially important in preventing heat loss from the body. Almost 90 percent of the body's heat loss is from the head. Without hair, 90 percent of the body's heat would be lost.*
*(H)*
The original question:
*What can prevent 90 percent of the body's heat loss?
Options:
- (A) Masks
- (B) fur
- (C) coats
- (D) bald head
- (E) increase body fat
- (F) sweaters
- (G) skin
- (H) hair*