What is the last stage of aerobic transportation?
Options:
- (A) formation of acetyl coenzyme A
- (B) Glycolysis
- (C) electron transport
- (D) Dehydration
- (E) citric acid cycle
- (F) flow of electrons
- (G) recovery time from fatigue
- (H) weight-lifting
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Let's think first: Electron transport is the final stage of aerobic respiration. Last, the final project is due. Electron transport in the last stage of aerobic respiration.... So the answer is [(C)]

What do all chemical changes require to occur?
Options:
- (A) during the day
- (B) heating liquids
- (C) Activation energy
- (D) wavelengths and photons
- (E) Burning fuel and air
- (F) kinetic energy
- (G) electromagnetic energy
- (H) direct energy
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Let's think first: All chemical reactions require activation energy to get started. Chemical changes are a result of chemical reactions. All chemical changes require activation energy to occur.... So the answer is [(C)]

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)]

What are endothermic vertebrates with legs?
Options:
- (A) Birds
- (B) mammals
- (C) Snakes
- (D) ducks
- (E) Lizards
- (F) ants
- (G) long
- (H) toads
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Let's think first: Birds are endothermic tetrapod vertebrates. Legs define Tetrapods. Birds are endothermic vertebrates with legs.... So the answer is [(A)]

What is necessary for a growing child?
Options:
- (A) four limbs
- (B) stamina
- (C) hydration
- (D) food
- (E) pets
- (F) minerals
- (G) plastics
- (H) a measuring stick
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Let's think first: Minerals are chemical elements that are essential for body processes. Children's bodies are in a developing process. Minerals are necessary for children's growths.... So the answer is [(F)]

Which has specialized reproductive organs?
Options:
- (A) Clouds
- (B) Conifers
- (C) River
- (D) peachleaf willow
- (E) Venus flytrap
- (F) animals
- (G) mammals
- (H) Mountain
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Let's think first: Plants have specialized reproductive organs. Most people know that the Venus Flytrap is a carnivorous plant. The Venus Flytrap has specialized reproductive organs.... So the answer is [(E)]