Logic of a solution: *Oxygen is essential for cellular respiration for all aerobic organisms. Oxygen, for example, is produced by plants. Plants are essential for cellular respiration for all aerobic organisms.*
*(F)*
The original question: *What is essential for cellular respiration for all aerobic organisms.
Options:
- (A) electron
- (B) glucose
- (C) Energy
- (D) Energy.
- (E) chemicals
- (F) Plants
- (G) fungi
- (H) bacteria*

Line 1: *Active immunity results when an immune response to a pathogen produces memory cells. Mechanisms by which intracellular pathogens evade activation of the cell mediated immune response. Active immunity results when intracellular pathogens evade activation of the cell.*
*(G)*
Line 2: *What results when intracellular pathogens evade activation of the cell?
Options:
- (A) resistance
- (B) Leptospirosis
- (C) major threat to health
- (D) Allergies
- (E) hospitalization
- (F) Localized damage
- (G) active immunity
- (H) massive damage*

Logic of a solution: *Fertilization of gametes produces a diploid zygote. Sperm and egg nuclei combine to form the diploid zygotic nucleus 2. Sperm and egg nuclei combine to fertilize gametes.*
*(C)*
The original question: *Sperm and egg nuclei combine to do what?
Options:
- (A) combine genes
- (B) rapid expansion
- (C) fertilize gametes
- (D) reproduce
- (E) allow growth
- (F) build proteins
- (G) spread flower seeds
- (H) remove eggs*

Line 1: *Mammals breathe with the help of a diaphragm. Common dolphins are mammals. Dolphins breathe with the help of a diaphragm.*
*(F)*
Line 2: *What does a diaphragm help a dolphin do?
Options:
- (A) swimming
- (B) rest
- (C) stay warm
- (D) smell
- (E) see
- (F) breathe
- (G) eat
- (H) survive*

Logic of a solution: *Wetlands are extremely important biomes. Biomes are global ecosystems. Wetlands are extremely important ecosystems.*
*(H)*
The original question: *Wetlands are a very important type of what?
Options:
- (A) forest land
- (B) allow growth
- (C) Plants growth
- (D) swamp
- (E) storing water
- (F) district
- (G) animals
- (H) ecosystem*

Logic of a solution: *Macroevolution occurs over geologic time above the level of the species. All geologic time can be divided into two eons. Macroevolution occurs over eons.*
*(C)*
The original question:
*Macroevolution most likely occurs over what period of time?
Options:
- (A) Summer
- (B) length
- (C) eons
- (D) long
- (E) growth
- (F) Earth
- (G) years
- (H) scale*