The dry mass of living organism is

Options

A. Biomass
B. Biovolume
C. Standard mass
D. Bioferticated mass

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Biomass**:
- Biomass refers to the total mass of living organisms in a given area or volume. It is a measure of the amount of organic material present in the organisms.

2. **Definition of Dry Mass**:
- The dry mass of an organism is the mass of the organism after all the water content has been removed. This is important because water content can vary significantly among organisms, and measuring dry mass provides a more accurate representation of the actual biomass.

3. **Ecological Pyramid**:
- In ecology, the pyramid of biomass represents the total dry mass of organisms at each trophic level in an ecosystem. It illustrates how energy and biomass are distributed among different levels of the food chain.

4. **Measurement of Biomass**:
- To determine the biomass, scientists collect all organisms at each trophic level and measure their dry weight. This is typically expressed in units such as grams per square meter (g/m²).

5. **Conclusion**:
- Therefore, the dry mass of living organisms is known as biomass. This is a key concept in ecology as it helps in understanding energy flow and nutrient cycling in ecosystems.

**Final Answer**: The dry mass of living organisms is known as biomass.

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