Advertisements
Advertisements
प्रश्न
Explain why, the flow of energy in the ecosystem is said to be unidirectional.
Give scientific reasons:
In an ecosystem, the energy flow is always unidirectional.
Advertisements
उत्तर
Energy enters plants from the sun during food production through photosynthesis. This energy is then passed on from one organism to another in a food chain. The energy given out by organisms as heat is lost in the environment and does not return to be used by plants again. This makes the flow of energy in an ecosystem unidirectional. Thus, the flow of energy in an ecosystem is said to be unidirectional because the energy lost as heat from the organisms in a food chain cannot be reused by plants in photosynthesis.
APPEARS IN
संबंधित प्रश्न
A food chain represents a unidirectional flow of X. What is X?
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
Define decomposers.
Write down a food chain in the sea.
At which trophic level a person is feeding when he is eating fish.
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
What could be X?
Write the percentage of energy transferred from autotrophs to the next level in a food chain.
Fill in the following blank with suitable word :
Plants → Antelope → ............
What is meant by bioconcentration of pesticides
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
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
Primary consumers that eat plants are called _______.
Arrange the following in a correct sequence and form a food chain
Human → Insect → Algae → Fish
Give some examples for Biodegradable and Non-biodegradable waste.
| S. No. | Biodegradable waste | Non-biodegradable waste |
| 1. | Food Waste | Plastic Bottles |
| 2. | ||
| 3. | ||
| 4. | ||
| 5. |
The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as ______.
In an ecosystem, herbivores represent ______.
Animals that eat both plants and animals are called as Carnivores.
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
