Logic of a solution: *Soil can be depleted of nutrients. An important nutrient commonly added to soil is nitrogen. Soil can be depleted of nitrogen.*
*(D)*
The original question: *Nitrogen depletion is a condition of some:
Options:
- (A) bushes
- (B) humans
- (C) animals
- (D) soils
- (E) disease
- (F) legumes
- (G) mammals
- (H) Birds*

Line 1: *Flagella help prokaryotes move. Flagella are hair-like projections from the surface of cells. Hair-like projections from the surface of cells that help prokaryotes move.*
*(E)*
Line 2: *What helps prokaryotes move?
Options:
- (A) sensory neurons
- (B) heat energy
- (C) Feet.
- (D) Wheels.
- (E) Hair-like projections.
- (F) Moving vans.
- (G) Chemical energy
- (H) kinetic energy*

Logic of a solution: *Cancer genes can be inherited. Genetic diseases are diseases that are inherited. Cancer genes can be genetic.*
*(B)*
The original question: *What can be a disease with genetic traits?
Options:
- (A) Allergies
- (B) cancer
- (C) blood
- (D) flu
- (E) disease cells
- (F) anemia
- (G) Smoking
- (H) illness*

Line 1: *Cells vary in size as well as shape, but all cells are very small. All cells are microscopic in size. Cells can vary in shape, but they are all microscopic.*
*(D)*
Line 2: *Cells pretty much al share this one characteristic:
Options:
- (A) sensory neurons
- (B) voltage
- (C) aerobic capacity
- (D) microscopic
- (E) eukaryotic
- (F) bacteria
- (G) prokaryotic
- (H) layers of fat*

Logic of a solution: *Chromosomes are coiled structures made of DNA and proteins. DNA stands for Deoxyribonucleicacid. Chromosomes are coiled structures made of Deoxyribonucleicacid and proteins.*
*(A)*
The original question: *What are chromosomes made of?
Options:
- (A) Deoxyribonucleicacid, protein
- (B) sulfuric acid, fat
- (C) Chemical energy
- (D) protein, hydrobromic acid
- (E) boric acid, protein
- (F) Something that comes in a bundle of fibers
- (G) sub-units of species
- (H) A compound that donates proton*

Logic of a solution: *Most fungi get organic compounds from dead organisms. Bacteria, fungi and plants can be used to break down organic compounds or extract metals. Organic compounds are broken down by plants.*
*(F)*
The original question:
*What is one thing organic compounds can be broken down by?
Options:
- (A) glucose
- (B) chemicals
- (C) trees
- (D) Cooking
- (E) oxygen
- (F) plants
- (G) Acids
- (H) bacteria*