The absolute growth rate is

Options

A. measurement and the comparison of total growth rate per unit time.
B. growth rate in whole life .
C. growth from birth to death
D. per unit initial parameters

Answer

To solve the question regarding the absolute growth rate (AGR), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Absolute Growth Rate (AGR)**:
- Absolute growth rate is defined as the increase in mass or weight of an organism or a part of it over a specific period of time. It is often measured in terms of weight or size increase per unit time.

2. **Measurement of AGR**:
- AGR can be expressed as the change in size or mass per unit time. This means we are looking at how much growth occurs in a given timeframe.

3. **Application of AGR**:
- AGR is commonly used to assess the growth of plants, particularly in terms of total leaf area per plant. This gives a clear indication of how much the plant has grown in a specific period.

4. **Evaluating the Options**:
- The question provides options to choose from regarding the definition of absolute growth rate.
- The first option states that it is a "measurement and comparison of total growth rate per unit time," which aligns with our understanding of AGR.
- The other options refer to growth over the entire lifespan or initial parameters, which do not accurately define AGR.

5. **Conclusion**:
- Based on the evaluation, the correct answer is the first option, as it correctly describes the absolute growth rate as a measurement of growth per unit time.

### Final Answer:
The absolute growth rate (AGR) is best described as the measurement and comparison of total growth rate per unit time.

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