Logic of a solution: *Meiosis is the type of cell division that produces gametes. Animals that reproduce sexually produce sex cells, or gametes. Meiosis is the type of cell division that produces sex cells.*
*(F)*
The original question: *What kind of cell division produces sex cells in animals?
Options:
- (A) complex
- (B) insects
- (C) pollen
- (D) gametes
- (E) sexual division
- (F) meiosis
- (G) reproduction cells
- (H) seeds*

Line 1: *Pneumonia may be caused by an infection or injury of the lungs. Streptococcal pneumonia is caused by the bacteria Streptococcus pneumoniae. Streptococcus can infect the lungs following injury.*
*(D)*
Line 2: *What can make lungs more at risk for infection by streptococcus?
Options:
- (A) Allergies
- (B) bacteria
- (C) Pollution
- (D) injury
- (E) fungi
- (F) sweating
- (G) the skin
- (H) smoking*

Logic of a solution: *Most plants grow roots down into the soil to absorb water and minerals. If the plant is green, it is a producer. Most producers grow roots down into the soil to absorb water and minerals.*
*(C)*
The original question: *What can a producer grow down into the soil in order to absorb minerals and water?
Options:
- (A) Trees
- (B) stems
- (C) roots
- (D) Oak
- (E) seeds
- (F) burrs
- (G) grass
- (H) water absorbing petals*

Line 1: *Heterotrophs are living things that cannot make their own food. All animals are heterotrophic and obtain their food from plants. Animals obtain their food from plants and cannot make their own food.*
*(E)*
Line 2: *What obtain their food from plants and cannot make their own food?
Options:
- (A) bacteria
- (B) Flowers
- (C) trees
- (D) lichen
- (E) animals
- (F) fungi
- (G) humans
- (H) grass*

Logic of a solution: *Sperm had to swim from male to female reproductive organs for fertilization. Male gametes are called sperm. Male gametes had to swim from male to female reproductive organs for fertilization.*
*(C)*
The original question: *Why do male gametes swim from male to female reproductive organs?
Options:
- (A) temperature changes
- (B) to leave the egg
- (C) fertilization
- (D) competition
- (E) it needs them
- (F) to feed
- (G) permineralization
- (H) to heal themselves*

Logic of a solution: *Energy enters ecosystems in the form of sunlight or chemical compounds. Biomes are global ecosystems. Energy enters biomes in the form of sunlight or chemical compounds.*
*(C)*
The original question:
*Where does energy enter into in the form of sunlight and chemical compounds?
Options:
- (A) sun
- (B) science lab
- (C) biomes
- (D) orchids
- (E) photons
- (F) deserts
- (G) black hole
- (H) trees*