[Q] What shares a location with spiracles?
Options:
- (A) wings
- (B) pistons
- (C) white
- (D) bats
- (E) animals
- (F) insects
- (G) pollen
- (H) ovaries
[A] Here's my solution: Wings are part of the exoskeleton and attached to the thorax. Spiracles are located on the abdomen and thorax. Wings and spiracles share a location. The answer is (A).

[Q] What is produced when plastic is made out of petroleum?
Options:
- (A) dangerous
- (B) bioaerosols
- (C) emissions
- (D) hydrocarbons
- (E) pollution
- (F) heat produced
- (G) Pesticides
- (H) heat energy
[A] Here's my solution: Plastics are made from petroleum and produce toxic waste. Pollution issues include toxic waste disposal. Plastics are made from petroleum and produce pollution. The answer is (E).

[Q] Growth hormones are derived from phospholipds and:
Options:
- (A) Energy.
- (B) cholesterol
- (C) animals
- (D) layers of fat
- (E) fur and fat
- (F) Chemical energy
- (G) kinetic energy
- (H) Energy
[A] Here's my solution: Steroid hormones are made of lipids, such as phospholipids and cholesterol. Steroids are a kind of growth hormones. Growth hormones are derived from phospholipids and cholesterol. The answer is (B).

[Q] Aging is associated with degrading:
Options:
- (A) Most plants
- (B) an object
- (C) Acids
- (D) telomeres
- (E) layers of fat
- (F) Chlorophyll
- (G) vegetation
- (H) the skin
[A]
Here's my solution: Aging is associated with the death of cells. Telomeres degrade as the cells divide and their shortening causes cell death. Aging is associated with degrading telomeres. The answer is (D).