In floating respiration substrate used is/are

Options

A. Carbohydrate only
B. Fat and carbohydrate
C. Fat and protein
D. Carbohydrate and protein

Answer

To solve the question regarding the substrate used in floating respiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Respiration in Plants**:
- Respiration in plants can be categorized based on the type of substrate used.

2. **Identify the Types of Respiration**:
- According to the scientist Blackman, respiration is divided into two main types:
- Floating respiration
- Protoplasmic respiration

3. **Determine the Substrates Used in Each Type**:
- For **floating respiration**, the substrates used are **fat and carbohydrate**.
- For **protoplasmic respiration**, the substrate used is **protein**.

4. **Analyze the Question**:
- The question specifically asks about the substrates used in **floating respiration**.

5. **Select the Correct Option**:
- Since floating respiration uses **fat and carbohydrate**, the correct answer is the option that includes both these substrates.

### Final Answer:
The substrate used in floating respiration is **fat and carbohydrate**.