Advertisements
Advertisements
प्रश्न
We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
What are the various steps of food chain called?
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
Write down a food chain which ends with humans.
The decomposers in an ecosystem ______.
Why are there rarely more than five links (or five organisms) in a food chain?
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Explain how harmful chemicals enter our bodies.
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
What would happen if an organism is removed from the food chain?
