Advertisements
Advertisements
प्रश्न
Why are plants called producers?
Advertisements
उत्तर
Plants are known as producers because they prepare their food themselves by the process of photosynthesis.
APPEARS IN
संबंधित प्रश्न
State with reason any two possible consequences of elimination of decomposers from the Earth.
Which of the following constitute a food-chain?
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
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 .............
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 eggs.
Give two differences between food chain and food web.
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
The following is a food chain that ends with human :
plants → bee → human
Explain how plants provide food for bees.
Match the terms given in column I with the terms given in column II and column III having the same meaning :
| Column I | Column II | Column III |
| (1) Secondary consumer | Herbivore | 1st trophic level |
| (2) Primary consume | Autotroph | 3rd trophic level |
| (3) Producer | Carnivore | 4th trophic level |
| (4) Tertiary consumer | Large carnivore | 2nd trophic level |
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
What is meant by bioconcentration of pesticides
In the food chain given below, if the amount of energy available at fourth trophic level is 5 kJ, what was the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
(a) 500 kJ
(b) 50 kJ
(c) 5000 kJ
(d) 5 kJ
Which of the following gets the minimum energy through the food chain in an ecosystem?
(a) carnivore
(b) large carnivore
(c) producer
(d) herbivore
Bacteria and fungi are called decomposers.
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
DDT was sprayed in a lake to regulate breeding of mosquitoes. How would it affect the trophic levels in the following food chain associated with a lake? Justify your answer.
In the following food chain, vertical arrows indicate the energy lost to the environment and horizontal arrows indicate energy transferred to the next trophic level. Which one of the three vertical arrows (A, C and E) and which one of the two horizontal arrows (B and D) will represent more energy transfer? Give reason for your answer.
A food chain in a forest ecosystem
