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प्रश्न
Which category of organisms forms the starting point of a food chain?
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उत्तर
Producers (green plants) form the starting point of a food chain.
संबंधित प्रश्न
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
Explain how the pesticides enter a food chain and subsequently get into our body.
The following statement is true or false :
In biology, human beings are called producers.
A food chain represents a unidirectional flow of X. What is X?
Name one decomposer.
Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain
At which trophic level a person is feeding when he is eating roasted chicken.
Construct a short foodchain, ending with man.
Write a common food chain of a pond ecosystem having four links.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
What is a food chain?
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
Which of the following group of organisms are not constituents of a food chain?
- grass, lion, rabbit, wolf
- plankton, man, fish, grasshopper
- wolf, grass, snake, tiger
- frog, snake, eagle, grass, grasshopper
The following is a food chain that ends with human :
How does this food chain differ form a usual food chain involving human such as : plants → goat → human?
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
The following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.
Explain how harmful chemicals enter our bodies.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
Explain why, a food chain usually cannot have more than three or four steps.
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.
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
Most of the water surface of a lake is covered with algae. This algae is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy?
(a) big fish
(b) bird
(c) larvae
(d) small fish
Each level in the food chain is called a ______ level.
In a food chain grasshopper gets energy by eating frog.
In the given food chain, suppose the amount of energy at the fourth trophic level is 5 kJ, what will be the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.
Reason (R): The flow of energy in a food chain is unidirectional.
If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.
