Logic of a solution: *Competition may lead to aggressive behaviors or displays of aggression. Frequently their behavior is aggressively hostile. Competition may lead to hostility.*
*(F)*
The original question: *Hostility can be one outcome of:
Options:
- (A) relocation
- (B) behavior research
- (C) decrease stamina
- (D) forces
- (E) fungi
- (F) competition
- (G) tolerance
- (H) Gunshots*

Line 1: *Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. Crocodiles, snakes, and lizards are all types of reptiles. Crocodiles are a type of tetrapod vertebrates that make amniotic eggs.*
*(D)*
Line 2: *What is an example of a tetrapod vertebrate?
Options:
- (A) genus
- (B) Leeuwenhoek
- (C) a fish
- (D) crocodile
- (E) animals
- (F) four limbs
- (G) warm-blooded
- (H) graptolites*

Logic of a solution: *Mollusks are invertebrates such as the common snail. Invertebrates are animals who lack a backbone or spinal column. Mollusks are animals who lack a backbone or spinal column.*
*(H)*
The original question: *What does an animal like a mollusk lack that many other animals have?
Options:
- (A) sensory neurons
- (B) Energy.
- (C) Bodily water
- (D) kinetic energy
- (E) alveoli
- (F) the skin
- (G) an organism's body
- (H) spinal column*

Line 1: *Some viruses live in a dormant state inside the body. When ferns are dormant it is as if they are hibernating. Some viruses live in a hibernating state inside the body.*
*(E)*
Line 2: *What can stay hidden in a hibernating state inside the body?
Options:
- (A) infections
- (B) blood cells
- (C) fungi
- (D) insects
- (E) viruses
- (F) honeybees
- (G) plasma
- (H) barnacles*

Logic of a solution: *Cartilage is a tough tissue that contains a protein called collagen. Sharks have a cartilage skeleton. Sharks have as skeleton that contains a protein called collagen.*
*(H)*
The original question: *Sharks have as skeleton that contains
Options:
- (A) elastin
- (B) Epidermis
- (C) calcium
- (D) fur and fat
- (E) marrow
- (F) strength
- (G) all matter
- (H) collagen*

Logic of a solution: *All life relies on a relatively narrow range of pH, or acidity. All organisms have a life-span. Organisms rely on a relatively narrow range of acidity.*
*(E)*
The original question:
*Organisms rely on a relatively narrow range of what?
Options:
- (A) Decibels
- (B) water
- (C) food
- (D) relativity
- (E) acidity
- (F) spectrum
- (G) balance
- (H) Light*