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प्रश्न
Pyramid of numbers is ______.
विकल्प
Always upright
Always inverted
Either upright or inverted
Neither upright nor inverted
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उत्तर
Pyramid of numbers is either upright or inverted.
APPEARS IN
संबंधित प्रश्न
Distinguish between upright and inverted pyramids.
Describe with examples of pyramids of number and biomass.
In a food chain, the herbivores are represented by
(A) producers
(B) primary consumers
(C) secondary consumers
(D) decomposers
“The pyramid of biomass is not always upright.” Explain the statement.
With reference to the levels of an organisation, differentiate between living organisms and non-living objects.
Answer the following question.
Write any two limitations of ecological pyramids.
'The pyramid of energy is always upright.' Explain
Give an example of an ecosystem that shows an inverted pyramid of biomass.
Distinguish between the upright and inverted pyramid of biomass.
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
Pyramid of biomass in terrestrial ecosystem shows sharp decline in
Which of the following statements is not correct?
Organisms at a higher trophic level have less energy available. Comment.
The number of trophic levels in an ecosystem are limited. Comment.
(a) Given below is a pyramid of biomass in an ecosystem where each bar represents the standing crop available in the trophic level. With the help of an example explain the conditions where this kind of pyramid is possible in nature.
(b) Will the pyramid of energy be also of the same shape in this situation? Give a reason for your response.
The biomass of a standing crop of phytoplankton is 4 kg/m2, which supports a large standing crop of zooplankton having a biomass of 11 kg/m2. This is consumed by small fishes having a biomass of 25 kg/m2, which are then consumed by large fishes with a biomass of 37 kg/m2.
Draw an ecological pyramid indicating the biomass at each stage and also name the trophic levels. Mention whether it is an upright or inverted pyramid.
| In a forest ecosystem, a large population of insect feeds upon a banyan tree. Several small birds feed upon these insects. The small birds are fed upon by big-sized birds. |
- With respect to this ecosystem, draw a pyramid for each biomass and a pyramid of number.
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If 20,000 Kcal energy is available at the level of insects, calculate the amount of energy available at the level of big-sized birds.
