मराठी

In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain? - Science

Advertisements
Advertisements

प्रश्न

In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain?    
Plants → Sheep → Man

Advertisements

उत्तर

In the given food chain, it is mentioned that the amount of energy available to the plants is 20,000  J. As we know that according to the ten percent law, only ten percent of the total energy at one trophic level is available for use to the next trophic level. So, the amount of energy available to the sheep is 2000 J, andamount of energy available to the man is 200 J.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2016-2017 (March) All India Set 3

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Write down a food chain with five links in it.


Give two differences between food chain and food web.


What is a food chain?


The sea water contains water beetles, tadpole, fish and weeds.

Which organisms are (i) predators, and (ii) prey?


The following is a food chain that ends with human :
plants → bee → human

How do bees provide food for humans?


How much energy will be available to hawks in the food chain comprising hawk, snake, paddy and mice, if 10,000 J of energy is available to paddy from the sun?


The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?


Your mother always thought that fruit juices are very healthy for everyone. One day she read in the newspaper that some brands of fruit juices in the market have been found to contain certain level of pesticides in them. She got worried as pesticides are injurious to our health.
(a) How would you explain to your mother about fruit juices getting contaminated with pesticides?
(b) It is said that when these harmful pesticides enter our body as well as in the bodies of other organisms they get accumulated and beyond a limit cause harm and damage to our organs. Name the phenomenon and write about it.


Arrange the following in a correct sequence and form a food chain

Human → Insect → Algae → Fish


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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×