Question

Study the following ecological pyramids carefully. Match the following statements (i), (ii) and (iii) with given pyramids A, B and C and select the correct answer.
(i) Inverted pyramid of biomass depicting small standing crop of phytoplanktons supporting a large standing crop of zooplanktons.
(ii) Pyramid of numbers in a grassland ecosystem showing about $6$ million producers.
(iii) Upright pyramid of biomass.

• A. A-(ii), B-(iii), C-(i)
• B. A-(ii), B-(i), C-(iii)
• C. A-(i), B-(iii), C-(ii)
• D. A-(i), B-(ii), C-(iii)

Answer 1

The correct option is A A-(ii), B-(iii), C-(i)

When the biomass of producer is less and that of the consumer is more the pyramid will have an inverted shape. It occurs in a pond and lake ecosystem. Here the biomass of diatoms in planktons is negligible as compared to their date of crustaceans and small fishes. inverted pyramid soil found in that ecosystem where the number and biomass of producers of more and those of consumers are less.

In most of the ecosystems, the number of the biomass of producers is more than those of a consumer is less. This type of ecosystem has a pyramid where the apex is pointed upwards. This type of pyramid is known as upright pyramid.

In some ecosystem, the number of the producers is more than the consumers. The apex is pointed upwards. This is known as the upright pyramid of the number. Found in the grassland ecosystem.

So, the correct option is 'A-(ii), B-(iii), C-(i)'