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प्रश्न
Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the ______.
विकल्प
food web
ecological pyramid
ecosystem
food chain
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उत्तर
Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the food web.
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संबंधित प्रश्न
List two important roles play in the environment by decomposers.
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
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 .............
Name one decomposer.
Write down a food chain with five links in it.
Give one example of a simple food chain.
Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
The sea water contains water beetles, tadpole, fish and weeds.
Write a food chain comprising all the given organisms.
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms in the food chain are herbivore, and carnivores?
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.
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name two zooplanktons.
Fill in the following blank with suitable word :
Grass → ........... → Human
What is ten per cent law? Explain with an example.
'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term damage to mankind'. Justify this statement.
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
What is meant by bioconcentration of pesticides
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
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.
We should reduce the use of the plastic bags, bottles etc. because ______.
In a food chain, the third trophic level is always occupied by
