Which one of the following is not used for construction of ecological pyramids?a)Dry weightb)Number of individualsc)Fresh weightd)Rate of energy flowCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Option c) Fresh weight is correct because

An ecological pyramid is a graphical representation of the relationship between different organisms. It shows the biomass at each trophic level of an ecosystem. It is of three types, pyramid of numbers, the pyramid of energy and the pyramid of biomass. The pyramid of numbers indicates the total number of individuals at each trophic level. The pyramid of energy indicates the rate of energy flow. Pyramid of biomass indicates the dry weight of living organisms at each trophic level.

Answer

Acc.to ncrt ... pyramid of biomass - the total dry weight of living Matter , pyramid of energy the rate of energy flow /productivity at successive trophic levels thus fresh weight is not used for the construction of ecological pyramids

Answer

Ecological Pyramids and their construction:
Ecological pyramids are graphical representations of the trophic structure and energy flow in an ecosystem. They depict the relationships between different trophic levels, such as producers, herbivores, and carnivores, in terms of biomass, number of individuals, or energy.

Types of Ecological Pyramids:
There are three types of ecological pyramids:
1. Pyramid of Numbers: Represents the number of individuals at each trophic level.
2. Pyramid of Biomass: Represents the total dry weight of organisms at each trophic level.
3. Pyramid of Energy: Represents the flow of energy through each trophic level.

Construction of Ecological Pyramids:
Ecological pyramids can be constructed using different parameters depending on the type of pyramid. The parameters used for construction are:

a) Dry weight: The total biomass or dry weight of organisms at each trophic level is used to construct a pyramid of biomass. It represents the amount of energy available in terms of organic matter.

b) Number of individuals: The number of individuals at each trophic level is used to construct a pyramid of numbers. It represents the population size and the number of organisms at each trophic level.

c) Fresh weight: Fresh weight is not commonly used for the construction of ecological pyramids. It refers to the weight of organisms when they are fresh and not dried. Since fresh weight includes water content, it is not an accurate measure of biomass or energy available in the ecosystem.

d) Rate of energy flow: The rate of energy flow through each trophic level is used to construct a pyramid of energy. It represents the transfer of energy from one trophic level to another and the overall efficiency of energy transfer in the ecosystem.

Conclusion:
Among the given options, the parameter 'Fresh weight' is not commonly used for the construction of ecological pyramids. It does not provide an accurate representation of biomass or energy available in the ecosystem due to the inclusion of water content. The other parameters, such as dry weight, number of individuals, and rate of energy flow, are commonly used and provide more meaningful insights into the trophic structure and energy flow in an ecosystem.

Answer

Fresh weight can not measure the exact mass, so it does not taken to consideration in ecological pyramid.

so instead of this dry is taken.

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Suggested Free Tests

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company