Living organisms are capable of extracting energy from (i) and store it in the form of (ii)

Options

A. (i) Oxidisable substance, (ii) Starch only
B. (i) Light, (ii) Glucose only
C. (i) Oxidisable substance, (ii) Bond energy
D. (i) Sun directly, (ii) Bond energy

Answer

To solve the question, we need to identify the sources from which living organisms extract energy and the form in which they store that energy.

### Step-by-Step Solution:

1. **Understanding Energy Extraction**:
Living organisms extract energy from food. This food is typically complex and needs to be broken down into simpler forms to be utilized effectively.

**Hint**: Think about the process of digestion and metabolism in organisms.

2. **Role of Oxidizable Substances**:
The complex food is simplified through metabolic processes, and during this simplification, it is converted into what we call oxidizable substances. These substances can easily combine with oxygen to release energy.

**Hint**: Recall the process of cellular respiration where glucose is oxidized.

3. **Energy Storage**:
Once the food is broken down into simpler forms, the energy released during this process is stored in the form of bond energy. This bond energy is what powers various biological processes in the organism.

**Hint**: Consider how energy is stored in molecules like ATP (adenosine triphosphate).

4. **Final Answer**:
Therefore, the two blanks in the question can be filled as follows:
(i) Oxidizable substances
(ii) Bond energy

### Conclusion:
Living organisms are capable of extracting energy from **oxidizable substances** and storing it in the form of **bond energy**.

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