Logic of a solution: *Chromosomes are the form of the genetic material of a cell during cell division. Mitosis is cell division. Chromosomes are the form of the genetic material of a cell during mitosis.*
*(A)*
The original question: *What are the form of the genetic material of a cell during mitosis?
Options:
- (A) chromosomes
- (B) graptolites
- (C) fur and fat
- (D) peachleaf willow
- (E) pollen
- (F) Leptospirosis
- (G) animals
- (H) it can be seen*

Line 1: *Hair is a fiber that is found only in mammals. All mammals are warm-blooded. Hair is a fiber that is found only in warm-blooded animals.*
*(E)*
Line 2: *What fiber can be found only in warm-blooded animals?
Options:
- (A) teeth
- (B) birth marks
- (C) muscle
- (D) taste buds
- (E) hair
- (F) wool
- (G) sugar
- (H) fur*

Logic of a solution: *Ethologists usually study how animals behave in their natural environment. Many ethologists capture their observations on videotape or audio tape. Scientists who study how animals behave use videotape or audio tape.*
*(A)*
The original question: *Scientists study animal behavior through which of the following?
Options:
- (A) audio and video tape
- (B) Electrical energy
- (C) irradiation
- (D) A computer
- (E) raising their temperature
- (F) Something coming from a gland
- (G) The bending of a ray of light
- (H) characteristics*

Line 1: *Wetlands are extremely important biomes. Marshes and swamps are wetlands. Marshes and swamps are extremely important biomes.*
*(H)*
Line 2: *What are extremely important biomes?
Options:
- (A) important habitats
- (B) urban city
- (C) remains of prehistoric life
- (D) zoos
- (E) water conservation
- (F) Most plants
- (G) manmade aqueducts
- (H) marshes and swamps*

Logic of a solution: *Mammals can also generate little bursts of heat by shivering. Shivering causes muscle contractions to warm the body. Mammals can also generate little bursts of heat through muscle contractions.*
*(G)*
The original question: *Mammals can also generate little bursts of heat through what?
Options:
- (A) Movement of an air mass
- (B) crackling
- (C) Veins and arteries.
- (D) electromagnetic energy
- (E) house
- (F) fire
- (G) muscle contractions
- (H) aerobic capacity*

Logic of a solution: *Organisms that live in marine biomes must be adapted to the salt in the water. Organisms or living beings are literally things that are alive. Living beings that live in marine biomes must be adapted to the salt in the water.*
*(D)*
The original question:
*Living beings in marine biomes must be adapted to what in the water?
Options:
- (A) CO 2
- (B) stress
- (C) liquid
- (D) salt
- (E) heat
- (F) an ion
- (G) energy
- (H) motion*