English

What is a food chain? - Science

Advertisements
Advertisements

Question

What is a food chain?

Very Short Answer
Advertisements

Solution

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.

shaalaa.com
  Is there an error in this question or solution?
Chapter 5: Our Environment - Exercise 1 [Page 228]

APPEARS IN

Lakhmir Singh Biology (Science) [English] Class 10
Chapter 5 Our Environment
Exercise 1 | Q 44.1 | Page 228
Nootan Biology [English] Class 12 ISC
Chapter 16 Ecosystem
Test Your Progress | Q 16. (i) | Page 657

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

Which of the following are always at the second tropic level of food chains?


We do not clean natural ponds or lakes but an aquarium needs to be cleaned regularly. Why is it so ? Explain.


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.


Construct a food chain comprising the following :
Snakes, Hawk, Rats, Plants


What is the role of decomposers in the ecosystem?


At which trophic level a person is feeding when he is eating roasted chicken.


At which trophic level a person is feeding when he is eating bread.


Write one or two word for the following statement/definition :

Organisms which depend on the producers for food either directly or indirectly


The decomposers in an ecosystem ______.


A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y

Name two zooplanktons.


In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?


Name two predators of snakes in a food web operating in a forest ecosystem.


What is meant by bioconcentration of pesticides


Consider the following food chain

(i) Plants → Mice → Snakes → Hawks
(ii) Plants → Mice →Hawks
If energy available at the producer level in both the food chains is 100 J, in which case will hawks get more energy as food and by how much? Justify your answer.:


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.


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


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


If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer?
(a) 15 J
(b) 10 J
(c) 1.50 J
(d) 0.15 J


The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid


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.

Write the food chain comprising all the organisms mentioned above.


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?


In an ecosystem, herbivores represent ______.


Which of the following is a logical sequence of food chain?


______ are organisms that are able to produce their own organic food.


Define – Heterotrophs.


Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as


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.

 


Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement. 


Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:

  1. Name the type of ecosystems that exist in food chains (b) and (c).
  2. The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
  3. Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×