Question

Mr X is eating curd/yoghurt. For this food intake in a food chain, which of the following trophic level will he occupy?

• A. First trophic level
• B. Second trophic level
• C. Third trophic level
• D. Fourth trophic level

Answer 1

The correct option is D Fourth trophic level

In the given example of food chain the primary consumer (second trophic level) is a cow which directly feeds on the producers or plant (first trophic level) in a terrestrial ecosystem. Curd/yoghurt is a commercial dairy product produced on fermenting the cows milk by lactobacillus bacteria (Streptococcus thermophillus). The bacteria in the milk utilizes the Lactose (milk sugar) and converts it into one of the by-products lactic acid. Thus lactobacillus is the secondary consumer (third trophic level) finally curd is eaten by Mr X who is the tertiary consumer (fourth trophic level)