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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.
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संबंधित प्रश्न
Distinguish between a food chain and a food web.
In a food chain, the herbivores are represented by
(A) producers
(B) primary consumers
(C) secondary consumers
(D) decomposers
With reference to the levels of an organisation, differentiate between living organisms and non-living objects.
Secondary consumers are __________.
Give an example of an ecosystem that shows an inverted pyramid of numbers.
Give an example of an ecosystem that shows an inverted pyramid of biomass.
Distinguish between the upright and inverted pyramid of biomass.
Define ecological pyramids.
Which ecosystem has the maximum biomass?
In a tree ecosystem the pyramid of numbers is:
Which one of the following is not used for construction of ecological pyramids?
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
Which of the following statements is not correct?
What does the base tier of the ecological pyramid represent?
Name any two organisms which can occupy more than one trophic level in an ecosystem.
A graphic representation of the biomass relationship between the producer and consumer in an ecosystem is called ______.
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.
Give a scientific reason:
The pyramid of energy is always upright.
| 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.
-
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.
