Logic of a solution: *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)*
The original question: *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*

Line 1: *Genes that are located on the same chromosome are called linked genes. Linked genes are inherited together. Genes that are located on the same chromosome are inherited together.*
*(F)*
Line 2: *What happens to genes located on the same chromosome
Options:
- (A) metabolic reaction
- (B) production of energy
- (C) produce offspring
- (D) female sex cells
- (E) The flowers are pollinated
- (F) They are inherited together
- (G) Earth orbiting the Sun
- (H) a hemisphere is tilted away from the sun*

Logic of a solution: *Bottleneck effect occurs when a population suddenly gets much smaller. Genetic variation can be reduced by random genetic drift, population bottlenecks, founder effect. Genetic variation can be reduced when a population suddenly gets much smaller.*
*(F)*
The original question: *What can be reduced when a population suddenly gets much smaller?
Options:
- (A) Pollution
- (B) The size of the Earth
- (C) Greenhouse gasses
- (D) The size of bottlenecks
- (E) The size of the environment
- (F) Genetic variation
- (G) Plant growth is reduced
- (H) Quality of life*

Line 1: *Fertilization takes place inside the female organism. Sharks have internal fertilization, and most give birth to live young. The female shark will give live birth.*
*(H)*
Line 2: *What animal gives live birth?
Options:
- (A) humans
- (B) goats
- (C) alpacas
- (D) rabbit
- (E) babies
- (F) fur seals
- (G) mammals
- (H) sharks*

Logic of a solution: *Cells secrete acids and bases to maintain the proper pH for enzymes to work. Acids and bases are electrolytes. Cells secrete electrolytes to maintain the proper pH for enzymes to work.*
*(H)*
The original question: *What do cells secrete to maintain the proper ph for enzymes to work?
Options:
- (A) Energy
- (B) Chemical energy
- (C) water conservation
- (D) sweating
- (E) heat energy
- (F) aqueous solution
- (G) Organic compounds
- (H) electrolytes*

Logic of a solution: *Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Sperm and eggs are cells known as gametes. Fertilization occurs when gametes fuse to form a diploid zygote.*
*(D)*
The original question:
*What occurs when gametes fuse to form a diploid zygote?
Options:
- (A) permineralization
- (B) rapid expansion
- (C) competition
- (D) fertilization
- (E) photosynthesis
- (F) chromosomes
- (G) mutation
- (H) Leptospirosis*