Advertisements
Advertisements
प्रश्न
What are autotrophs?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give reason to justify the following: The existence of decomposers is essential in a biosphere.
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
Write an aquatic food chain.
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 .............
Define decomposers.
Write down a food chain in the sea.
At which trophic level a person is feeding when he is eating bread.
At which trophic level a person is feeding when he is eating apple.
Which of the following statement is incorrect?
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
Fill in the following blank with suitable word :
Plants → Antelope → ............
What percentage of sun's energy falling on the leaves of green plants is utilised by the plants in the process of photosynthesis and stored as chemical energy of food?
(a) 99 per cent
(b) 10 per cent
(c) 1 per cent
(d) 20 per cent
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
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.
Primary consumers that eat plants are called _______.
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
Each level in the food chain is called a ______ level.
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.
Which organism in the food chain Grass → Insects → Thrush → Sparrow Hawk is classified as a tertiary consumer?
