Environmental Sciences, asked by tanushrinaidu140082, 1 day ago

Complete the following :
Oxygen : respiration :: ____________ : expiration.
Photosynthesis : Oxygen :: Respiration : ________________
Oxygen : 21% :: Nitrogen : _________________

Answers

Answered by reenakhannamehta
1

Answer:

  1. oxygen:respiration::combination.
  2. photosynthesis:oxygen::respiration:carbon dioxide.
  3. oxygen:21 %::nitrogen:78%
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