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प्रश्न
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
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उत्तर
The bird in the food chain will have the maximum concentration of harmful chemicals among the given organisms, because it lies at the highest trophic level
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संबंधित प्रश्न
State with reason any two possible consequences of elimination of decomposers from the Earth.
Why are green plants called producers?
List two important roles play in the environment by decomposers.
Why are plants called producers?
The following statement is true or false :
Secondary consumers and tertiary consumers, both are carnivores.
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
What will happen if we kill all the organisms in one trophic level?
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Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
At which trophic level a person is feeding when he is eating bread.
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Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
What is a 'food web'? Show its formation.
The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.
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What is meant by bioconcentration of pesticides
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
We should reduce the use of the plastic bags, bottles etc. because ______.
