Define R.Q. What is its significance ?

Explanation

### Step-by-Step Solution:

1. **Definition of R.Q.**:
- R.Q. stands for Respiratory Quotient. It is a measure used to assess the efficiency of respiration in organisms.

2. **Formula of R.Q.**:
- The Respiratory Quotient is defined as the ratio of the volume of carbon dioxide (CO2) produced to the volume of oxygen (O2) consumed during respiration.
- Mathematically, it can be expressed as:
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