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प्रश्न
Write a common food chain of a pond ecosystem having four links.
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उत्तर
Algae →Protozoa→Small fish→Big fish
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संबंधित प्रश्न
List two main components of ecosystem?
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Which of the following constitute a food-chain?
What is biological magnification?
What are the various steps of food chain called?
Name one decomposer.
The decomposers in an ecosystem ______.
Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
Which of the following statement is incorrect?
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
The following is a food chain that ends with human :
plants → bee → human
Explain how plants provide food for bees.
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
What could be X?
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
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.
Which other organism you could write in place of bird in the above food chain?
Food chains are very important for the survival of most species.
Matter and energy are two fundamental inputs of an ecosystem. Movement of:
In a food chain, the third trophic level is always occupied by
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
