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What Is Pyramid of Number

When the numb...

Question

When the number of organisms at successive levels is plotted, they assume the shape of a pyramid. This is called the pyramid of

A

Biomass

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B

Number

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C

Energy

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D

None of the these

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Solution

The correct option is B
Number

The graphical representation of individuals at successive higher trophic level (stepwise) with producers kept at the base and top carnivores kept at the top is called a pyramid of numbers.

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Q. When the number of organisms at successive levels are plotted, they assume the shape of pyramid. This is called as pyramid of

Q. Read the following statements regarding ecological pyramids and choose the correct answer.
(a) Relationship between organisms at different trophic levels is expressed in terms of number, biomass and energy.
(b) Any calculations of energy content, biomass or number has to include one group of organisms at that trophic level.
(c) In most ecosystems, all the pyramids of number, biomass and energy are upright.
(d) The pyramid of biomass in sea is generally inverted.
(e) Pyramid of energy is always inverted and can never be upright.

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(iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels.
(iv) Saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

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What Is Pyramid of Number

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