Select the incorrect statement from the following .

Options

A. All animals depends on plants directly for their food needs
B. Death of the organism is the beginning of the detritus food chain/web
C. Those animals that depends on thee primary carnivores for food are labeled as secondary consumers
D. Primary producers an aquatic ecosystem are various species like phytoplanktons ,algae and higher plants

Answer

To solve the question of selecting the incorrect statement from the provided options, we can follow these steps:

### Step 1: Analyze Each Statement
We have four statements to evaluate:

1. **All animals depend on plants directly for their food needs.**
2. **Death of the organism is the beginning of the detritus food chain.**
3. **Those animals that depend on the primary carnivores for food are labeled as secondary consumers.**
4. **Primary producers in an aquatic ecosystem include various species like phytoplankton, algae, and higher plants.**

### Step 2: Evaluate Statement 1
- This statement claims that all animals depend directly on plants for food.
- This is incorrect because only herbivores (primary consumers) depend directly on plants. Carnivores and omnivores depend on herbivores or other carnivores for their food.

### Step 3: Evaluate Statement 2
- This statement asserts that the death of an organism marks the beginning of the detritus food chain.
- This is correct. The detritus food chain starts with dead organic matter.

### Step 4: Evaluate Statement 3
- This statement states that animals that depend on primary carnivores for food are secondary consumers.
- This is correct. Secondary consumers feed on primary consumers (carnivores).

### Step 5: Evaluate Statement 4
- This statement mentions that primary producers in an aquatic ecosystem include phytoplankton, algae, and higher plants.
- This is also correct. Phytoplankton and algae are indeed primary producers in aquatic ecosystems.

### Step 6: Conclusion
After evaluating all statements, it is clear that the incorrect statement is:

**1. All animals depend on plants directly for their food needs.**

### Final Answer
The incorrect statement is **Option 1**.

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