Question

Which one of the following is not used for
construction of ecological pyramids?
(a) Number of individuals
(b) Rate of energy flow
(c) Fresh weight
(d) Dry weight

Answer 1

The one not used for the construction of ecological pyramids is:

(c) Fresh weight

• Ecological pyramids graphically represent trophic structure and relationship between different organisms.

• For this reason, fresh weight is not used for their construction.

• There are 3 types of the ecological pyramid :

1. Pyramid of numbers.
2. Pyramid of biomass.
3. Pyramid of energy.

Answer 2

Answer is option "c"

Explanation:

• An ecological pyramid is an graphical presentation of different organisms to show the relationship between the organism and the tropical level.
• It is of three types, pyramid of numbers, pyramid of energy and pyramid of biomass. Pyramid of numbers indicates the total number of individuals at each trophic level.
• Pyramid of energy indicates the rate of energy flow. Pyramid of biomass indicates the dry weight of living organisms at each trophic level.
• Hence, the right answer is option c "fresh weight".