Improvement of motor skills is a key component of health-related physical fitness.
a. true
b. false
b. false
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Which one of the following characteristics is NOT true for all living cells?
a. All cells are derived from preexisting cells. b. All cells contain a nucleus. c. All cells utilize organic fuel molecules as energy sources for their activities. d. All cells respond to outside stimulation. e. All cells possess a plasma membrane.
How long is a typical C-C bond?
a. 0.580 nm b. 0.107 nm c. 0.154 nm d. 0.214 nm
When Stanley Miller applied heat and electrical sparks to a mixture of simple inorganic compounds such as methane, hydrogen gas, ammonia, and water vapor, what compounds were produced?
A) only simple organic compounds such as formaldehyde and cyanide B) mostly hydrocarbons C) only simple inorganic compounds D) simple organic compounds, amino acids, and hydrocarbons
What are the chemical weapons involved with the first line of defense?
A. mucus and cilia lining the respiratory tract B. saliva and digestive enzymes C. oil and sweat glands within the skin D. All of the choices are correct.