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प्रश्न
We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.
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उत्तर
Aquarium is an artificial ecosystem that contains fishes as living organisms. In natural ecosystems, other organisms are also present in sufficient number to maintain a balance. In natural aquatic ecosystem, uneaten food or fish waste turns into ammonia and then bacteria convert these pollutants into non-toxic “nitrates”. Therefore, if the water of aquarium is not changed regularly, then wastes could accumulate to dangerous level, which can lead to the death of fishes.
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संबंधित प्रश्न
"Energy flow in a food chain is unidirectional" Justify this statement.
List two important roles play in the environment by decomposers.
Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Which of the following gets the minimum energy through the food chain in an ecosystem?
(a) carnivore
(b) large carnivore
(c) producer
(d) herbivore
If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer?
(a) 15 J
(b) 10 J
(c) 1.50 J
(d) 0.15 J
Arrange the following in a correct sequence and form a food chain
Rabbit → Carrot → Eagle → Snake
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
Natural agents like ______ are the decomposition factors breaking complex forms into simpler units.
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
