Which one of the following shows a pyramid of biomass in a pond ecosystem ?

Options

A.
B.
C.
D.

Answer

To solve the question regarding which option shows a pyramid of biomass in a pond ecosystem, we can follow these steps:

### Step 1: Understand the Pyramid of Biomass
- A pyramid of biomass represents the total mass of living matter at each trophic level in an ecosystem. In a typical ecosystem, the biomass decreases as you move from producers to primary consumers to secondary consumers and so on.

### Step 2: Analyze the Pond Ecosystem
- In a pond ecosystem, the primary producers are usually aquatic plants and phytoplankton. These organisms are generally low in biomass compared to the consumers that feed on them, such as zooplankton (primary consumers) and fish (secondary and tertiary consumers).

### Step 3: Identify the Characteristics of the Pyramid
- In a pond ecosystem, the biomass of the producers is often less than that of the consumers. This leads to an inverted pyramid shape where the biomass of consumers is greater than that of producers.

### Step 4: Evaluate the Options
- Look at the provided options and determine which one represents the inverted pyramid of biomass. The correct option will show a higher biomass at the higher trophic levels (consumers) compared to the lower trophic levels (producers).

### Step 5: Select the Correct Answer
- Based on the analysis, the first option represents the inverted pyramid of biomass in a pond ecosystem, where the biomass of producers is low compared to that of the consumers.

### Final Answer
- The correct option is the **first pyramid**, which illustrates an inverted pyramid of biomass in a pond ecosystem.

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