What process provides one substance transported by the blood?
Options:
- (A) breathing
- (B) heat produced
- (C) drink
- (D) complex
- (E) osmosis
- (F) sweating
- (G) cell division
- (H) condensation
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Let's think first: Oxygen is just one substance transported by the blood. Breathing and circulation allow oxygen to be transported to the body's cells. Breathing provides one substance transported by the blood.... So the answer is [(A)]

What affects the respiratory and circulatory systems in the body?
Options:
- (A) HIV
- (B) sulfur
- (C) smog
- (D) stress
- (E) fever
- (F) sweat
- (G) heat
- (H) tar
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Let's think first: Air pollution harms the respiratory and circulatory systems. An example of an air pollution reaction is the production of photochemical smog. Smog harms the respiratory and circulatory systems.... So the answer is [(C)]

What is essential for cellular respiration for organisms consuming voas and alcohols?
Options:
- (A) carbon
- (B) glucose
- (C) h2o
- (D) Air
- (E) oxygen
- (F) Energy
- (G) Energy.
- (H) water
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Let's think first: Oxygen is essential for cellular respiration for all aerobic organisms. Aerobic organisms consume VOAs and alcohols. Oxygen is essential for cellular respiration for organisms consuming VOAs and alcohols.... So the answer is [(E)]

Where do all adult echinoderms live?
Options:
- (A) soil
- (B) desert
- (C) freshwater
- (D) fossils
- (E) water
- (F) Earth
- (G) small
- (H) aquariums
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Let's think first: Adult echinoderms have radial symmetry. All animals with radial symmetry live in water. All adult echinoderms live in water.... So the answer is [(E)]

The bonds of that which when heavy is deuterium cause what to expand when it freezes?
Options:
- (A) matter
- (B) rings
- (C) CO 2
- (D) liquids
- (E) gas
- (F) solutes
- (G) cations
- (H) water
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Let's think first: Hydrogen bonds cause water to expand when it freezes. Deuterium, or heavy hydrogen, is an isotope of hydrogen, or a hydrogen atom with a neutron added. The bonds of that which when heavy is Deuterium cause water to expand when it freezes.... So the answer is [(H)]

Neurons are the structural and functional units of where what is critical?
Options:
- (A) organs
- (B) Glial cells
- (C) nerves
- (D) Structural units
- (E) voltage
- (F) Storage units
- (G) Critical care
- (H) A computer
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Let's think first: Neurons are the structural and functional units of the nervous system. Glial cells perform critical functions in the nervous system. Neurons are the structural and functional units of where the glial cells perform critical functions.... So the answer is [(B)]