In a modern society, approximately what percentage of human ...

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In a modern society, approximately what percentage of human energy is used to produce food?
 
  A) 10
  B) 25
  C) 45
  D) 65

Question 2

Which of the following statements about ethylene and polyethylene is true?
 
  A) The polymer has the same properties as the monomer.
  B) The polymer has alternating double and single bonds between carbons, while the monomer has only single bonds between carbons.
  C) The polymer has alternating double and single bonds between carbons, while the monomer has only double bonds between carbons.
  D) The polymer has only single bonds between carbons, while the monomer has only double bonds between carbons.

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Answer to Question 1

A

Answer to Question 2

D

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