Line 1: *Echinoderms lack a centralized nervous system. Echinoderms are represented by the starfish. Starfish lack a centralized nervous system.*
*(G)*
Line 2: *What kind of animal doesn't have a centralized nervous system?
Options:
- (A) dog
- (B) mammals
- (C) cows
- (D) bird
- (E) human
- (F) elephants
- (G) starfish
- (H) a fish*

Logic of a solution: *Soil can be depleted of nutrients. Dirt is really misplaced soil. Dirt can be depleted of nutrients.*
*(F)*
The original question: *When gardening what can be depleted of nutrients?
Options:
- (A) fertilizer
- (B) bacteria
- (C) the plant
- (D) coal
- (E) pine
- (F) the dirt
- (G) Acids
- (H) water*

Line 1: *Plants release oxygen during the day but not during the night. All plants are trees. Trees release oxygen during the day but not at night.*
*(H)*
Line 2: *What do trees release during the day but not at night?
Options:
- (A) Energy
- (B) water
- (C) He
- (D) Ce
- (E) chemicals
- (F) Energy.
- (G) heat
- (H) oxygen*

Logic of a solution: *Viruses contain DNA but not much else. DNA is an abbreviation for deoxyribonucleic acid. Viruses contain deoxyribonucleic acid but not much else.*
*(E)*
The original question: *What contains deoxyribonucleic acid but not much else.
Options:
- (A) minerals
- (B) bacteria
- (C) loose soil
- (D) pollen
- (E) viruses
- (F) anemia
- (G) PDAs
- (H) vertebrates*

Line 1: *Earthworm burrows help aerate soil, which is also good for plants. Aeration breaks up the soil and allows water to penetrate. Earthworm burrows allow water to penetrate the soil, which is good for plants.*
*(H)*
Line 2: *_ allow water to penetrate the soil.
Options:
- (A) crawfish burrows
- (B) major threat to health
- (C) Deposition
- (D) bending light rays
- (E) earthworm homes
- (F) Exfoliation
- (G) termite burrows
- (H) Earthworm burrows*

Line 1: *Sweat wets the skin, and when it evaporates, it cools the body. Perspiration There are about 2 million sweat glands in the average human body. Perspiration wets the skin, and when it evaporates, it cools the body.*
*(G)*
Line 2:
*What wets the skin, and when it evaporates, it cools the body?
Options:
- (A) heat energy
- (B) acetic acid
- (C) Air conditioner
- (D) salt and water.
- (E) Skin oil
- (F) water vapor
- (G) Perspiration
- (H) A towel*