Advertisements
Advertisements
प्रश्न
What is a food chain?
Advertisements
उत्तर
The sequence of living organisms in a community in which one organism consumes another organism to transfer food energy is called a food chain. An example of a simple food chain is that operating in a grassland.
संबंधित प्रश्न
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
List two biotic components of a biosphere.
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
In the following food chain, 100 J of energy is available to the lion. How much energy was available to the producer?
Plants → Deer → Lion
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.
Fill in the following blank with suitable word :
A series of organisms, each of which feeds on the next organism, the beginning of which is a green plant, is called a .............
At which trophic level a person is feeding when he is eating apple.
Construct a short foodchain, ending with man.
Give one example of a simple food chain.
The decomposers in an ecosystem ______.
Which of the following is not a producer?
(a) grass
(b) zooplankton
(c) phytoplankton
(d) paddy
In the food chain comprising of a snake, grass, insect, and frog, the secondary consumer is :
(a) insect
(b) snake
(c) frog
(d) grass
The following is a food chain that ends with human :
Do you think that the food chain given in this question can really be regarded as a food chain? Explain your answer.
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Name two predators of snakes in a food web operating in a forest ecosystem.
What does garbage consist of?
Which of the following limits the number of trophic levels in a food chain?
(a) insufficient food supply from producer level
(b) decrease in energy at higher trophic levels
(c) increase in the number of organisms at higher trophic levels
(d) accumulation of harmful chemicals at higher trophic levels
What percentage of sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as chemical energy of food?
(a) 99 per cent
(b) 10 per cent
(c) 1 per cent
(d) 20 per cent
A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird
What are decomposers? What will be the consequence if the decomposers are completely eradicated from an ecosystem? Give justification in support of your answer.
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
We should reduce the use of the plastic bags, bottles etc. because ______.
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.
Analogy:
Primary Consumer: Goat, Cow:: Secondary Consumer: ______.
DDT was sprayed in a lake to regulate breeding of mosquitoes. How would it affect the trophic levels in the following food chain associated with a lake? Justify your answer.
