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प्रश्न
What would happen to the number of grass plants and foxes if the number of rabbits decreased?
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उत्तर
If the number of rabbits decreases, then there will be less food for foxes. Hence, they will not be able to survive, because of the shortage of food, and their number will decrease. A decrease in the number of rabbits will lead to an increase in the density of grass plants, as there will be fewer rabbits to consume them.
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संबंधित प्रश्न
Which of the following constitute a food-chain?
Explain the terms 'producer' and 'consumer'. Give two examples of producers and two of consumers.
What is the role of decomposers in the ecosystem?
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
Draw the food chain with four trophic levels.
In the figure given alongside, the various trophic levels are shown in the form of a pyramid. At which trophic level the maximum energy is available?

The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
What would happen to the number of grass plants and foxes if the number of rabbits increased?
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?
Fill in the following blank with suitable word :
Grass → ........... → Human
Explain how harmful chemicals enter our bodies.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :
(a) water beetles
(b) tadpoles
(c) weeds
(d) fish
Observe the food web and answer the questions given below:

Why do all food chains start with plants?
______ obtained energy from the chemical breakdown of dead organisms.
In a food chain grasshopper gets energy by eating frog.
In the following food chain, vertical arrows indicate the energy lost to the environment and horizontal arrows indicate energy transferred to the next trophic level. Which one of the three vertical arrows (A, C and E) and which one of the two horizontal arrows (B and D) will represent more energy transfer? Give reason for your answer.

A food chain in a forest ecosystem
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