Advertisements
Advertisements
प्रश्न
Consider the following food chain
(i) Plants → Mice → Snakes → Hawks
(ii) Plants → Mice →Hawks
If energy available at the producer level in both the food chains is 100 J, in which case will hawks get more energy as food and by how much? Justify your answer.:
Advertisements
उत्तर
According to the 10 per cent law, only 10 per cent of the energy entering a particular trophic level of organisms is available for the next higher trophic level. If the energy at the producer level is 100 J, the energy at the hawk level in both the food chains can be calculated as under.
(i) Plants → Mice Snakes→ Hawks
100 J→ 10 J → 1 J → 0.1 J
(ii) Plants → Mice→ Hawks
100 J → 10 J → 1 J
So, it is clear that hawks will get 10 per cent more energy in the second food chain compared with the first food chain.
APPEARS IN
संबंधित प्रश्न
"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?
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?
In the following food chain, 100 J of energy is available to the lion. How much energy was available to the producer?
Plants → Deer → Lion
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
A food chain represents a unidirectional flow of X. What is X?
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.
At which trophic level a person is feeding when he is eating roasted chicken.
In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
The following is a food chain that ends with human :
plants → bee → human
Explain how plants provide food for bees.
What would happen to the number of rabbits and grass plants if the number of foxes increased?
Fill in the following blank with suitable word :
Plants → Antelope → ............
What does garbage consist of?
Calculate the amount of energy that will be available to big fish in the following food chain, if 10,000 J of energy is available to small algae from the sun :
Small algae → Zooplankton → Fish → Big fish
How much energy will be available to hawks in the food chain comprising hawk, snake, paddy and mice, if 10,000 J of energy is available to paddy from the sun?
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
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.
What would happen if an organism is removed from the food chain?
If 100 J energy is available at the producer level in a food chain then the energy available to the secondary consumer will be ______.
Each level in the food chain is called a ______ level.
