Which of the following occur at the same trophic level ?

Options

A. Deer and Bee
B. Cow and Crow
C. Earthworm and Frog
D. Snake and Vulture

Answer

To determine which organisms occur at the same trophic level, we first need to understand the concept of trophic levels in an ecosystem. Trophic levels represent the position of an organism in a food chain, and they are categorized as follows:

1. **Primary Producers (1st Trophic Level)**: These are organisms that produce their own food through photosynthesis, such as plants and algae.
2. **Primary Consumers (2nd Trophic Level)**: These are herbivores that eat primary producers. Examples include deer and cows.
3. **Secondary Consumers (3rd Trophic Level)**: These are carnivores that eat primary consumers. Examples include snakes that eat herbivores.
4. **Tertiary Consumers (4th Trophic Level)**: These are higher-level carnivores that eat secondary consumers. An example is a vulture that eats snakes.

Now, let's analyze the options provided in the question:

1. **Deer and Cow**: Both of these are herbivores that feed on plants, placing them both at the **1st Trophic Level**. Therefore, they occur at the same trophic level.

2. **Cow and Crow**: The cow is a primary consumer (2nd Trophic Level), while the crow, which may feed on insects or other animals, can be considered a secondary consumer (3rd Trophic Level). Thus, they do not occur at the same trophic level.

3. **Snake and Vulture**: The snake, being a secondary consumer (3rd Trophic Level), eats primary consumers, while the vulture, which feeds on snakes, is a tertiary consumer (4th Trophic Level). They do not occur at the same trophic level.

4. **Other combinations**: Any other combinations would similarly need to be analyzed based on their feeding habits and positions in the food chain.

Based on this analysis, the correct answer to the question is that **Deer and Cow occur at the same trophic level** (1st Trophic Level).