Agriculture originated when ________
A) humans domesticated plants and animals for their use
B) people decided that hunting was too difficult
C) people came together to divide the earth into farming plots
D) kings forced their subjects to stay in towns and villages
E) when wives forced their husbands to get into the field and get food
Answer: A
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The ________ is what needs to be overcome in a reaction so that it can proceed to the products.
A. activation energy B. bond energy C. catalyst D. thermodynamics E. entropy
What is the development of similar characteristics in distantly related organisms called?
a. analogous evolution b. divergent evolution c. homologous evolution d. convergent evolution e. parallel evolution
When the Sun is positioned slightly below the horizon, its direct rays cannot be seen at the surface, but diffuse radiation can illuminate the sky to create ________ conditions
Fill in the blank(s) with the appropriate word(s).
The world's population is now more than
A. 20 million B. 700 million C. 70 billion D. 7 billion E. 70 million