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Author Question: The most important chemical regulator of respiration is A) oxygen. B) carbon dioxide. C) ... (Read 90 times)

faduma

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on: Feb 28, 2019
The most important chemical regulator of respiration is
 A) oxygen.
  B) carbon dioxide.
  C) bicarbonate ion.
  D) sodium ion.
  E) hemoglobin.

Question 2

Light refraction takes place at the
 A) cornea and lens.
  B) lens only.
  C) optic disc.
  D) cornea and optic disc.
  E) cornea only.


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Eunice618

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Reply #1 on: Feb 28, 2019
Answer to Question 1

B

Answer to Question 2

A


faduma

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Reply 2 on: Feb 28, 2019
Gracias!

helenmarkerine

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

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