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प्रश्न
Will the levels of biological magnification be different at different levels of the ecosystem?
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उत्तर १
उत्तर २
The level of these harmful substances will go on increasing from one trophic level to the next. When certain harmful substances enter the food chain at the level of primary producers, they get concentrated many times at each subsequent trophic level.
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संबंधित प्रश्न
List two biotic components of a biosphere.
In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain?
Plants → Sheep → Man
What are planktons?
The following statement is true or false :
In biology, human beings are called producers.
Which organisms belong to third and fourth trophic levels in the food chain comprising the following?
Rats, Plants, Hawk, Snakes
What is a trophic level?
Write down a food chain with five links in it.
At which trophic level a person is feeding when he is eating bread.
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
What would happen to the number of grass plants and foxes if the number of rabbits decreased?
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.
Fill in the following blank with suitable word :
Grass → ........... → Human
'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term damage to mankind'. Justify this statement.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
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
Write the importance of the food chain.
Food chains are very important for the survival of most species.
If 10,000 J solar energy falls on green plants in a terrestrial ecosystem, what percentage of solar energy will be converted into food energy?
Define – Heterotrophs.
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
