Plants cell walls are made of 
Options:
- (A) fiber
- (B) keratin
- (C) alveoli
- (D) cations
- (E) matter
- (F) CO 2
- (G) porous
- (H) Cane.
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Let's think first: Plants are multicellular eukaryotes with cell walls made of cellulose. Basically, fiber is cellulose . Plants cell walls are made of fiber.... So the answer is [(A)]
What is the speed of the change in the characteristics of living things over time?
Options:
- (A) Jet speed.
- (B) Speed of light.
- (C) long
- (D) Slow.
- (E) Mach speeds.
- (F) slows
- (G) speed
- (H) years
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Let's think first: Evolution is a change in the characteristics of living things over time. Biological evolution is slow, while corporate evolution is fast. The change in the characteristics of living things over time is slow.... So the answer is [(D)]
Organisms rely on a relatively narrow range of what?
Options:
- (A) Decibels
- (B) water
- (C) food
- (D) relativity
- (E) acidity
- (F) spectrum
- (G) balance
- (H) Light
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Let's think first: All life relies on a relatively narrow range of pH, or acidity. All organisms have a life-span. Organisms rely on a relatively narrow range of acidity.... So the answer is [(E)]
Sweat cools the body when it
Options:
- (A) Movement of an air mass
- (B) dry conditions
- (C) heat produced
- (D) Decreased precipitation
- (E) hydration
- (F) It expands
- (G) the environment
- (H) turns into a gas
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Let's think first: Sweat wets the skin, and when it evaporates, it cools the body. Evaporation is when a liquid turns into a gas. Sweat cools the body when it turns into a gas.... So the answer is [(H)]
Forests stabilize what influences what growth?
Options:
- (A) Trees
- (B) Energy
- (C) wind
- (D) seasons
- (E) rain
- (F) plant
- (G) Winter
- (H) Energy.
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Let's think first: Climate influences plant growth, biodiversity, and adaptations of land organisms. Climate Forests stabilize climate. Forests stabilize what influences plant growth.... So the answer is [(F)]
Most people can survive only a few days without what?
Options:
- (A) h2o
- (B) urea
- (C) CO2
- (D) beds
- (E) houses
- (F) air
- (G) NaCl
- (H) H20
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Let's think first: Most people can survive only a few days without water. H20 Bottled water was generally consumed last year. Most people can survive only a few days without H20.... So the answer is [(H)]