Question

Arrange the following from lowest to highest dry weight in a biomass pyramid of a grassland ecosystem:
(A) Primary Producer
(B) Primary Consumer
(C) Secondary Consumer
(D) Tertiary Consumer
Choose the correct answer from the options given below:

• A. (D), (C), (B), (A)
• B. (A), (C), (B), (D)
• C. (A), (B), (C), (D)
• D. (D), (C), (A), (B)

Answer 1

The Correct Option is A

Within a grassland biomass pyramid, organisms are categorized by their trophic levels. Biomass, measured as dry weight, diminishes progressively from lower to higher trophic levels. This reduction is attributable to energy loss through metabolic functions and energy transfer inefficiencies. The arrangement, from least to greatest dry weight, is as follows:

1. Primary Producer (A): Forming the pyramid's foundation, these organisms possess the highest biomass, supporting all subsequent levels via photosynthesis.
2. Primary Consumer (B): Herbivores that consume primary producers hold more biomass than secondary and tertiary consumers.
3. Secondary Consumer (C): Carnivores that feed on primary consumers exhibit slightly greater biomass than tertiary consumers.
4. Tertiary Consumer (D): Positioned at the apex of the food chain, these organisms have the minimal biomass due to cumulative energy dissipation across preceding trophic levels.

Consequently, the sequence from the lowest to the highest dry weight is: (D), (C), (B), (A).