Line 1: *Most reptiles have good eyesight and a keen sense of smell. Reptilia contains over 7800 entries on numerous species of reptiles. Most animals in the class reptilia have good eyesight and a keen sense of smell.*
*(H)*
Line 2: *Most of what kind of animal have good eyesight and a good sense of smell?
Options:
- (A) have a positive impact on the environment
- (B) members of their own species
- (C) Something that makes plants green
- (D) passenger pigeons
- (E) Something with a head, thorax, and abdomen
- (F) Something that is self-aware
- (G) competing for resources
- (H) animals in the class reptilia*

Logic of a solution: *Viruses are usually considered to be nonliving. Viruses Viruses are the smallest agents of disease. The smallest agents of diseases are nonliving.*
*(C)*
The original question: *What is considered nonliving?
Options:
- (A) Leptospirosis
- (B) major threat to health
- (C) smallest agent of disease
- (D) harmful substances
- (E) direct damage to the lungs
- (F) Food poisoning
- (G) an area swollen with pus
- (H) loses an electron*

Line 1: *Fish have a circulatory system with a two-chambered heart. Fish include bass and salmon. Salmon have a circulatory system with a two-chambered heart.*
*(C)*
Line 2: *What has a circulatory system with a two-chambered heart?
Options:
- (A) sharks
- (B) insects
- (C) salmon
- (D) animals
- (E) barnacles
- (F) mammals
- (G) tortoises
- (H) alpacas*

Logic of a solution: *TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH. Another function of TSH is to maintain the structural integrity of the thyroid gland. TRH stimulates the pituitary gland to maintain structural integrity of the thyroid.*
*(A)*
The original question: *What stimulates the pituitary gland in order to maintain structural integrity of the thyroid?
Options:
- (A) TRH
- (B) Urea
- (C) CO 2
- (D) PDAs
- (E) HPV
- (F) SO2
- (G) mL
- (H) p53*

Line 1: *Cancer is a disease that occurs when the cell cycle is no longer regulated. P16 is a regulator of the cell division cycle. Cancer is a disease that occurs when genes like P16 stop functioning properly.*
*(C)*
Line 2: *P16 is an example of what type of thing that causes cancer when it stops functiong properly?
Options:
- (A) Toxins
- (B) edema
- (C) gene
- (D) ferns
- (E) CO 2
- (F) PDAs
- (G) HIV
- (H) albino*

Line 1: *Sweating reduces body heat. Sweat is made of salt and water. Saltwater excretion reduces body heat.*
*(H)*
Line 2:
*Saltwater excretion reduces what?
Options:
- (A) emissions
- (B) dehydration
- (C) light energy
- (D) bacteria
- (E) sweat
- (F) energy usage
- (G) evaporation
- (H) body heat*