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प्रश्न
At which trophic level a person is feeding when he is eating bread.
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उत्तर
Second trophic level.
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संबंधित प्रश्न
State with reason any two possible consequences of elimination of decomposers from the Earth.
"Energy flow in a food chain is unidirectional" Justify this statement.
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
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
The following statement is true or false :
In biology, human beings are called producers.
Which category of organisms forms the starting point of a food chain?
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.
Which of the following represents a possible food chain found in a pond :
| Primary producers |
Primary consumers | Secondary consumers |
| (a) green algae | fish | mosquito larvae |
| (b) fish | green algae | mosquito larvae |
| (c) mosquito larvae | fish | green algae |
| (d) green algae | mosquito larvae | fish |
Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
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.
Why are there rarely more than five links (or five organisms) in a food chain?
Explain how harmful chemicals enter our bodies.
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
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.
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 ______.
______ obtained energy from the chemical breakdown of dead organisms.
Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.
Reason (R): The flow of energy in a food chain is unidirectional.
