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Author Question: According to the greenhouse effect theory, higher concentrations of ________ in the atmosphere ... (Read 41 times)

jon_i

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According to the greenhouse effect theory, higher concentrations of ________ in the atmosphere increase the earth's temperature.
 
  a. Oxygen c. Nitrogen
  b. Carbon dioxide d. Hydrogen dioxide

Question 2

The phylum Arthropoda consists of animals that have a hard external skeleton called an ___________________ __.
 
  Fill in the blank(s) with correct word



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Kedrick2014

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Answer to Question 1

B

Answer to Question 2

exoskeleton




jon_i

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Reply 2 on: Jul 21, 2018
Gracias!


Sarahjh

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

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