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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.
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
The following statement is true or false :
In biology, human beings are called producers.
Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants
At which trophic level a person is feeding when he is eating fish.
What is a food chain?
One of the following is a micro-consumer. This one is :
(a) ant
(b) lice
(c) fungi
(d) mosquito
The following is a food chain that ends with human :
plants → bee → human
Explain how plants provide food for bees.
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Why are there rarely more than five links (or five organisms) in a food chain?
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
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
