[Q] What relies on a relatively narrow range of something you can measure with paper strips?
Options:
- (A) Length
- (B) voltage
- (C) all life
- (D) mammals
- (E) humans
- (F) Most plants
- (G) agriculture
- (H) animals
[A] Here's my solution: All life relies on a relatively narrow range of pH, or acidity. Acidity is measured with a pH meter or with pH paper strips. All life relies on a relatively narrow range of something you can measure with paper strips. The answer is (C).

[Q] Biomass is the total mass of what at a trophic level?
Options:
- (A) Plants growth
- (B) peachleaf willow
- (C) Conifers
- (D) animals
- (E) living things
- (F) Most plants
- (G) all matter
- (H) insects
[A] Here's my solution: Biomass is the total mass of organisms at a trophic level. An organism is a living thing. Biomass is the total mass of living things at a trophic level. The answer is (E).

[Q] What attract pollinators like animals that eat apples and disperse the undigested seeds?
Options:
- (A) beans
- (B) honeybees
- (C) stalks
- (D) roots
- (E) bushes
- (F) orchids
- (G) ferns
- (H) flowers
[A] Here's my solution: Flowers attract pollinators, and fruits encourage animals to disperse the seeds. Sweet fruit like apples are eaten by animals that disperse the undigested seeds. Flowers attract pollinators like animals that eat apples and disperse the undigested seeds. The answer is (H).

[Q] 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
[A]
Here's my solution: 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. The answer is (F).