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प्रश्न
Pyramid of numbers is ______.
पर्याय
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
Give diagrammatic representation of pyramid of numbers.
In an ecosystem dominated by trees, the pyramid (of numbers) is ______ type.
Distinguish between a food chain and a food web.
Describe with examples of pyramids of number and biomass.
With reference to the levels of an organisation, differentiate between living organisms and non-living objects.
Secondary consumers are __________.
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:
In a pyramid of biomass, if the total dry weight (kgm-2) of primary produces is about 809, it well increases at tertiary consumer level up to ______.
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are 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.
The number of trophic levels in an ecosystem are limited. Comment.
What are the shortcomings of ecological pyramids in the study of ecosystems?
(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.
| 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.
