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प्रश्न
What are autotrophs?
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उत्तर
Autotrophs are organisms that can produce their own food using simple inorganic substances from their environment. They do not rely on other organisms for nutrition.
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संबंधित प्रश्न
"Energy flow in a food chain is unidirectional" Justify this statement.
List two biotic components of a biosphere.
List two main components of ecosystem?
Explain how the pesticides enter a food chain and subsequently get into our body.
Write down a food chain in the sea.
Write down a food chain with five links in it.
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 fish.
Which of the following are decomposers of dead organisms?
| Bacteria | Fungi | Viruses |
| (a) no | yes | yes |
| (b) yes | no | yes |
| (c) yes | yes | no |
| (d) yes | yes | yes |
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
If 5 joules of energy is available at producer level (plants), then how much energy will be transferred to the lion in the following food chain?
Plants → Goat → Lion
What is ten per cent law? Explain with an example.
A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird
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
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.
We should reduce the use of the plastic bags, bottles etc. because ______.
Which of the following is a logical sequence of food chain?
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
______ are organisms that are able to produce their own organic food.
