NEET 2018 · BiologyPrevious Year Question
What type of ecological pyramid would be obtained with the following data? Secondary consumer : 120 g; Primary consumer : 60 g; Primary producer : 10 g
Answer: (C) Inverted pyramid of biomass. Answer: (C) The biomass increases up the trophic levels: primary producer 10 g < primary consumer 60 g < secondary consumer 120 g.
- A.Upright pyramid of numbers
- B.Pyramid of energy
- C.Inverted pyramid of biomass✓
- D.Upright pyramid of biomass
Correct Answer
(C) Inverted pyramid of biomass
Solution & Explanation
Answer: (C) The biomass increases up the trophic levels: primary producer 10 g < primary consumer 60 g < secondary consumer 120 g. A pyramid in which the producer base is smaller than the higher levels is an inverted pyramid of biomass, characteristic of aquatic ecosystems. Hence the answer is (c). NCERT Reference: Ch 12, p.212 — “small standing crop of phytoplankton supports large”
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