Logic of a solution: *Wings are part of the exoskeleton and attached to the thorax. An exoskeleton is an external framework. Wings are part of the external framework.*
*(D)*
The original question: *What body part would be attached to the external framework?
Options:
- (A) heart
- (B) insects
- (C) respiratory system
- (D) wings
- (E) humans
- (F) Tail
- (G) fat
- (H) digestive system*

Logic of a solution: *Cells that divide uncontrollably may form a tumor, or abnormal mass of cells. When p53 is mutated, cells divide uncontrollably. When p53 is mutated a tumor may form.*
*(A)*
The original question: *If a tumor has formed, this gene might have mutated:
Options:
- (A) p53
- (B) SNPs
- (C) OCA 2
- (D) DNA
- (E) gene
- (F) tRNA
- (G) malignancy
- (H) TRH*

Logic of a solution: *Plants that shed their leaves seasonally each year are called deciduous plants. Grapevines are woody deciduous plants. Grapevines shed their leaves seasonally each year.*
*(B)*
The original question:
*What kind of plant would shed its leaves each year?
Options:
- (A) it needs them
- (B) grapevines
- (C) burning coal
- (D) warm-blooded
- (E) When it's cold
- (F) white
- (G) heat or cold
- (H) homogenous*