Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Weed→ Tadpole → Water beetle
There are three links in this food chain
APPEARS IN
संबंधित प्रश्न
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
What will happen if we kill all the organisms in one trophic level?
Why are plants called producers?
What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?
Write an aquatic food chain.
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
Define decomposers.
What is a trophic level?
Can the organisms of any trophic level be removed without causing any damage to the ecosystem? Will the impact of removing all the organisms in a trophic level be different for different trophic levels?
Which of the following is not a producer?
(a) grass
(b) zooplankton
(c) phytoplankton
(d) paddy
The following is a food chain that ends with human :
plants → bee → human
How do bees provide food for humans?
The following is a food chain that ends with human :
How does this food chain differ form a usual food chain involving human such as : plants → goat → human?
Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
Which common pesticide has accumulated in human body in considerable amounts?
Most of the water surface of a lake is covered with algae. This algae is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy?
(a) big fish
(b) bird
(c) larvae
(d) small fish
Food chains are very important for the survival of most species.
Matter and energy are two fundamental inputs of an ecosystem. Movement of:
Define – Heterotrophs.
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.
