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प्रश्न
Name one decomposer.
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उत्तर
Bacteria are decomposers.
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संबंधित प्रश्न
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
Write a common food chain of a pond ecosystem having four links.
Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
What is a food chain?
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms are (i) predators, and (ii) prey?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name the organism which Y could be.
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Explain why, a food chain usually cannot have more than three or four steps.
What percentage of sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as chemical energy of food?
(a) 99 per cent
(b) 10 per cent
(c) 1 per cent
(d) 20 per cent
An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :
(a) water beetles
(b) tadpoles
(c) weeds
(d) fish
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?
(a) snake
(b) eagle
(c) mice
(d) peacock
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.
Write the food chain comprising all the organisms mentioned above.
Write the importance of the food chain.
A food chain comprising birds, green plants, fish and man. The concentration of harmful chemical entering the food chain will be maximum in ______.
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
______ obtained energy from the chemical breakdown of dead organisms.
In the given food chain, suppose the amount of energy at the fourth trophic level is 5 kJ, what will be the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.
Which of the following statements is correct?
