What type of trunk does evergreen usually have?
Options:
- (A) oak
- (B) greenwood
- (C) woody
- (D) bark
- (E) hollowed
- (F) Spruce
- (G) spiny
- (H) bent
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Let's think first: Most modern gymnosperms are trees with woody trunks. Gymnosperms are the plants that are known as evergreens. Evergreens are mostly trees with woody trunks.... So the answer is [(C)]

What size are cells?
Options:
- (A) either huge or tiny
- (B) non existent
- (C) dense
- (D) large
- (E) white
- (F) tiny
- (G) dead
- (H) albino
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Let's think first: Cells vary in size as well as shape, but all cells are very small. Atoms are tiny particles that are too small to see. Cells vary in size as well as shape, but all cells are very tiny.... So the answer is [(F)]

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
--
Let's think first: 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.... So the answer is [(D)]

Which type of system do most animals without backbones have?
Options:
- (A) sensory neurons
- (B) Veins and arteries.
- (C) Nervous system
- (D) Stereo system
- (E) Root system
- (F) to move people
- (G) Skeletal system
- (H) insects
--
Let's think first: Most invertebrates have a nervous system. Invertebrates are animals without a backbone. Most animals without backbones have a nervous system.... So the answer is [(C)]

What gets organic compounds from dead organisms?
Options:
- (A) plants
- (B) elms
- (C) mud
- (D) molds
- (E) dead cats
- (F) cows
- (G) trees
- (H) sludge
--
Let's think first: Most fungi get organic compounds from dead organisms. Molds are microscopic fungi. Molds get organic compounds from dead organisms.... So the answer is [(D)]

This helps with sensing and maintaining body position:
Options:
- (A) lightheaded
- (B) sweating
- (C) inner ear
- (D) cochlea
- (E) four limbs
- (F) nerves
- (G) Riding a bike
- (H) dizzy
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Let's think first: Balance is the ability to sense and maintain body position. Another part of the inner ear is used for balance. The inner ear helps with sensing and maintaining body position.... So the answer is [(C)]