Logic of a solution: *Plants that are adapted to very dry environments are called xerophytes. Succulents, bromeliads and cacti are xerophytes. A plant that is adapt to a very dry environment is a cacti.*
*(B)*
The original question: *Cacti are adapted to what?
Options:
- (A) the snow
- (B) dry environments
- (C) Animal survival
- (D) survival
- (E) tropical regions
- (F) moist environments
- (G) relocation
- (H) salt and water.*
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: *Mollusks are a major food source for other organisms, including humans. Mollusks are soft-bodied invertebrates. Soft-bodied invertebrates are a major food source for other organisms, including humans.*
*(B)*
The original question: *What are a major food source for other organisms, including humans?
Options:
- (A) Earthworms
- (B) Soft-bodied invertebrates
- (C) Fully cooking the oysters
- (D) absorb light energy
- (E) remains of prehistoric life
- (F) members of their own species
- (G) Humans
- (H) Lawns*
Line 1: *All chemical reactions require activation energy to get started. Activation energy is required to overcome the energy barrier. All chemical reactions must first overcome the energy barrier.*
*(D)*
Line 2: *What must a chemical reaction overcome before starting?
Options:
- (A) PV=nRT
- (B) heat or cold
- (C) reactants
- (D) energy barrier
- (E) Dehydration
- (F) harmful substances
- (G) resistance
- (H) temperature*
Logic of a solution: *Mollusks are a major food source for other organisms, including humans. Mollusks are invertebrates and are no exception. Invertebrates are a major food source for other organisms, including humans.*
*(C)*
The original question: *What is a major food source for other organisms, including humans?
Options:
- (A) gastropod shells
- (B) orchids
- (C) invertebrates
- (D) swamp vegetation
- (E) Most plants
- (F) insects
- (G) barnacles
- (H) animals*
Logic of a solution: *Amphibians are the first true tetrapods, or vertebrates with four limbs. Frogs are classified as amphibians. Frogs are tetrapods.*
*(C)*
The original question:
*_ are tetrapods.
Options:
- (A) animals
- (B) amoeba
- (C) Frogs
- (D) Length
- (E) insects
- (F) Spiders
- (G) Snakes
- (H) Birds*