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प्रश्न
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Which organism in the above food chain is a (1) primary consumer, and (2) tertiary consumer?
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उत्तर
(1) Zooplankton are primary consumers, and (2) big fish are tertiary consumers.
संबंधित प्रश्न
State with reason any two possible consequences of elimination of decomposers from the Earth.
What will happen if we kill all the organisms in one trophic level?
In the following food chain, plants provide 500 J of energy to rats. How much energy will be available to hawks from snakes?
Plants → Rats → Snakes → Hawks
Which organisms belong to third and fourth trophic levels in the food chain comprising the following?
Rats, Plants, Hawk, Snakes
A food chain represents a unidirectional flow of X. What is X?
What will happen if we kill all the organisms in one trophic level?
Can the organisms of any trophic level be removed without causing any damage to the ecosystem? Will the impact of removing all the organisms in a trophic level be different for different trophic levels?
Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
Explain why, a food chain usually cannot have more than three or four steps.
Most of the water surface of a lake is covered with algae. This algae is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy?
(a) big fish
(b) bird
(c) larvae
(d) small fish
| A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high. |
- In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
- Which organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?
- Write the food chain comprising all the organisms mentioned above.
- Which other organism you could write in place of bird in the above food chain?
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
Which other organism you could write in place of bird in the above food chain?
Animals that eat both plants and animals are called as Carnivores.
Which group of organisms are not constituents of a food chain?
- Grass, lion, rabbit, wolf
- Plankton, man, fish, grasshopper
- Wolf, grass, snake, tiger
- Frog, snake, eagle, grass, grasshopper
Which statement is correct with respect to the food chain?
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:
- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
Which of the following statements is correct?
Quaternary consumers are described as:
