Identify correct pair of statements
(i) Attraction between two molecules of water present in oxylen channel is adhesion
(ii) Number of `O_(2)` molecules absorbed is more than number of `CO_(2)` molecules released when triolein is respiratory substrate
(iii) Bacillus mycodies is nitrifying bacteria
(iv) Continuous system of cell walls and intercullular spaces in plant tissues is called apoplast
1 ii and iii
2 iii and iv
3 ii and iv
4 I and iv.

Options

A. ii and iii
B. iii and iv
C. ii and iv
D. I and iv.

Answer

To solve the question, we need to evaluate the correctness of each statement provided:

1. **Statement (i)**: "Attraction between two molecules of water present in oxylen channel is adhesion."
- **Analysis**: This statement is incorrect. The attraction between two water molecules is known as cohesion, not adhesion. Adhesion refers to the attraction between water molecules and other substances.

2. **Statement (ii)**: "Number of O₂ molecules absorbed is more than number of CO₂ molecules released when triolein is respiratory substrate."
- **Analysis**: This statement is correct. When triolein (a fatty acid) is metabolized, the respiratory quotient (RQ) is less than 1, indicating that more oxygen is consumed than carbon dioxide produced. Specifically, the RQ for fats is around 0.7, which supports this statement.

3. **Statement (iii)**: "Bacillus mycodies is nitrifying bacteria."
- **Analysis**: This statement is incorrect. Bacillus mycoides is not a nitrifying bacterium; it is classified as an ammonifying bacterium, which means it helps in the decomposition of organic matter and the release of ammonia.

4. **Statement (iv)**: "Continuous system of cell walls and intercellular spaces in plant tissues is called apoplast."
- **Analysis**: This statement is correct. The apoplast refers to the non-living parts of the plant tissue, including cell walls and intercellular spaces, which facilitate the movement of water and solutes.

Now, let's summarize the correctness of the statements:
- Statement (i): Incorrect
- Statement (ii): Correct
- Statement (iii): Incorrect
- Statement (iv): Correct

Based on this analysis, the correct pairs of statements are (ii) and (iv).

**Final Answer**: The correct option is **3: ii and iv**.