Temperature and pressure receptors in most animals are located:
Options:
- (A) Veins and arteries.
- (B) in one limb each
- (C) in the same organ
- (D) an organism's body
- (E) it keeps an organism warm
- (F) in two different organs
- (G) in plants
- (H) frontal zones
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Let's think first: Pressure receptors are found mainly in the skin. Temperature sensors in vertebrates are located in the skin and in the hypothalamus. Temperature and pressure sensors are located in the same organ in most animals.... So the answer is [(C)]

What can be caused by direct or passive inhalation?
Options:
- (A) skin grafts
- (B) prolonged thirst
- (C) science
- (D) Toxicity
- (E) lung cancer
- (F) negative
- (G) friction
- (H) craters
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Let's think first: Lung cancer is most often caused by exposure to tobacco smoke. Smoke Tobacco smoke , whether directly or passively inhaled, has been shown to worsen asthma. Lung cancer can be caused by direct or passive inhalation.... So the answer is [(E)]

What can frogs, toads and salamanders use to smell and taste chemicals?
Options:
- (A) sense organs
- (B) Chemical energy
- (C) matter vibrating
- (D) larynx
- (E) Organic compounds
- (F) ocular organs
- (G) gills
- (H) harmful substances
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Let's think first: Amphibians have sense organs to smell and taste chemicals. Frogs, toads and salamanders are amphibians. Frogs, toads, and salamanders have sense organs to smell and taste chemicals.... So the answer is [(A)]

Sperm had to swim from male to female what for fertilization?
Options:
- (A) The flowers are pollinated
- (B) seed dispersal
- (C) that material's properties
- (D) produce offspring
- (E) Something coming from a gland
- (F) A compound that donates proton
- (G) metabolic reaction
- (H) Organs within the body.
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Let's think first: Sperm had to swim from male to female reproductive organs for fertilization. Within the body are the stomach and reproductive organs. Sperm had to swim from male to female organs within the body for fertilization.... So the answer is [(H)]

What kind of cancer does exposure to cigarettes and cigars often cause?
Options:
- (A) lung
- (B) UV
- (C) foot
- (D) damage
- (E) skin
- (F) death
- (G) breast
- (H) harm
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Let's think first: Lung cancer is most often caused by exposure to tobacco smoke. Tobacco includes cigarettes, cigars, chewing tobacco, and more. Lung cancer is often caused by exposure to cigarettes and cigars.... So the answer is [(A)]

In what way does a catalyst help in chemical reactions?
Options:
- (A) Generating heat
- (B) lowered energy cost
- (C) metabolic reaction
- (D) heating liquids
- (E) by making heat
- (F) adding heat
- (G) increases a body's strength
- (H) preventing heat transfer
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Let's think first: All chemical reactions require activation energy to get started. Catalysts lower the activation energy. A catalyst can lower the energy cost of a chemical reaction.... So the answer is [(B)]