Among the following , more than one trophic level in a food chain can be occupied by :

Options

A. Fish and zooplanktons
B. Sparrow and insectivorous plants
C. Frog and lion
D. Grasses and lichens

Answer

To solve the question regarding which organisms can occupy more than one trophic level in a food chain, we can follow these steps:

### Step 1: Understand Trophic Levels
Trophic levels represent the position an organism occupies in a food chain. The primary producers (like plants) occupy the first trophic level, primary consumers (herbivores) occupy the second, and secondary consumers (carnivores) occupy the third.

**Hint:** Remember that organisms can occupy different trophic levels based on their feeding habits.

### Step 2: Analyze the Options
We need to evaluate each option provided in the question to determine if any organism can occupy more than one trophic level.

1. **Fish:** Generally, fish can be primary consumers (eating algae) or secondary consumers (eating smaller fish). So, they can occupy more than one trophic level.

**Hint:** Think about the diet of the organism and how it fits into the food chain.

2. **Zooplankton:** Typically, zooplankton are primary consumers, feeding on phytoplankton. They do not occupy multiple trophic levels.

**Hint:** Consider if the organism has a varied diet that allows it to fit into different levels.

3. **Sparrow:** Sparrows can feed on seeds (making them primary consumers) or insects (making them secondary consumers). Thus, they occupy more than one trophic level.

**Hint:** Look for organisms that have a varied diet.

4. **Insectivorous Plants:** These plants can act as primary producers (when they photosynthesize) and also as secondary consumers (when they consume insects). Therefore, they occupy more than one trophic level.

**Hint:** Consider how plants can also be consumers in certain contexts.

5. **Frog:** Frogs can be primary consumers (eating plants) and secondary consumers (eating insects), so they occupy more than one trophic level.

**Hint:** Think about the life cycle of the organism and its feeding habits.

6. **Lion:** Lions are primarily secondary consumers as they mainly eat herbivores. They do not occupy more than one trophic level.

**Hint:** Focus on whether the organism is specialized in its diet.

7. **Grasses and Lichens:** Both of these are primary producers and occupy only the first trophic level.

**Hint:** Remember that producers usually occupy only one level.

### Step 3: Conclusion
Based on the analysis:
- Fish, sparrows, insectivorous plants, and frogs can occupy more than one trophic level.
- The correct answer to the question is **sparrow and insectivorous plants** since they can occupy both the first and third trophic levels.

**Final Answer:** The organisms that can occupy more than one trophic level in a food chain are **sparrow and insectivorous plants**.