Advertisements
Advertisements
प्रश्न
Name and state the law given by Lindeman which tells us how much energy entering a particular trophic level of organisms is available for trasnsfer to the next higher trophic level.
Advertisements
उत्तर
The law given by Lindeman is called the 10 per cent law. It states that only 10 per cent of the energy entering a particular trophic level of organisms is available for transfer to the next trophic level.
APPEARS IN
संबंधित प्रश्न
Give reason to justify the following: The existence of decomposers is essential in a biosphere.
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
What is the role of decomposers in the ecosystem?
What is meant by a primary consumer?
A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain?
Give one example of a simple food chain.
In the figure given alongside, the various trophic levels are shown in the form of a pyramid. At which trophic level the maximum energy is available?
What would happen to the number of rabbits and grass plants if the number of foxes increased?
If a harmful chemical enters a food chain comprising cat, mice and plants, which one of these organisms is likely to have the maximum concentration of the harmful chemical in its body?
Name two predators of snakes in a food web operating in a forest ecosystem.
Which common pesticide has accumulated in human body in considerable amounts?
What provides the energy which then flows through a food chain?
(a) glucose
(b) oxygen
(c) respiration
(d) sunlight
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
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 forest ecosystem having a lot of green plants has some foxes, lions and rabbits in it.
(a) Write a food chain comprising all the four organisms mentioned above.
(b) Name (i) one herbivore, and (ii) two carnivores, in this food chain.
(c) Name the link which is a predator as well as a prey.
(d) Name (i) second trophic level, and (ii) third trophic level.
(e) Which link of this food chain can feed on second trophic level as well as third trophic level, independently?
(f) If the sun provides 1000 J of energy to the plants, then how much energy will be transferred to fox through the food chain.
"Energy flow in food chains is always unidirectional". Justify this statement. Explain how the pesticides enter a food chain and subsequently get into our body.
Primary consumers that eat plants are called _______.
In an ecosystem, herbivores represent ______.
In a food chain, the third trophic level is always occupied by
