Ques:[What may be caused by an infection or injury of the lungs?
Options:
- (A) death and devastation
- (B) deadly and devastating
- (C) Legionnaires' disease
- (D) blood
- (E) smoking
- (F) a lot of human deaths
- (G) a tree falling
- (H) cigarettes]
Ans:[Pneumonia may be caused by an infection or injury of the lungs. Legionnaires' disease is a type of pneumonia. Legionnaires' disease may be caused by an infection or injury of the lungs.
(C)]

Ques:[Plants are multicellular eukaryotes with what walls?
Options:
- (A) A solid geometric shape
- (B) preventing heat transfer
- (C) bone and skin
- (D) starch and bone
- (E) food and shelter
- (F) starch and protein
- (G) homogenous
- (H) starch and cellulose]
Ans:[Plants are multicellular eukaryotes with cell walls made of cellulose. For example, the walls of plant cells are made in large part of starch and cellulose . Plants are multicellular eukaryotes with starch and cellulose walls.
(H)]

Ques:[How do starfish communicate with each other?
Options:
- (A) huddle together
- (B) writing
- (C) during the day
- (D) pheromones
- (E) Chemical energy
- (F) waving their arms
- (G) Decibels
- (H) talking]
Ans:[Echinoderms use pheromones to communicate with each other. Echinoderms are represented by the starfish. Starfish use pheromones to communicate with each other.
(D)]

Ques:[What gas is produced by burning propane?
Options:
- (A) Greenhouse gases
- (B) Sulfur dioxide
- (C) gasoline
- (D) Carbon monoxide
- (E) hydrocarbons
- (F) carbon dioxide
- (G) dangerous
- (H) heating liquids]
Ans:
[Carbon monoxide is a gas produced by furnaces and other devices that burn fuel. Cabins have wood burning stoves and propane furnaces. Carbon monoxide is a gas produced by burning propane.
(D)]