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Author Question: The average C02 level in the earth's atmosphere is ________ ppm yet the common level injected into ... (Read 31 times)

mmm

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on: Jul 22, 2018
The average C02 level in the earth's atmosphere is ________ ppm yet the common level injected into greenhouses is ________________ ppm.
 
  Fill in the blank(s) with correct word

Question 2

What quality (color) of light stimulates seed germination?
 
  What will be an ideal response?


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angrybirds13579

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Reply #1 on: Jul 22, 2018
Answer to Question 1

about 400 ppm, 900-1200 ppm.

Answer to Question 2

Red.


mmm

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Reply 2 on: Jul 22, 2018
Excellent

apple

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Reply 3 on: Yesterday
Wow, this really help

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