Advertisements
Advertisements
प्रश्न
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
Advertisements
उत्तर
The pesticides enter the phytoplankton from the polluted water. This level of organisms is known as producers.
APPEARS IN
संबंधित प्रश्न
List two biotic components of 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?
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
Write down a food chain with five links in it.
At which trophic level a person is feeding when he is eating apple.
Construct a long food chain.
In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
Which of the following group of organisms are not constituents of a food chain?
- grass, lion, rabbit, wolf
- plankton, man, fish, grasshopper
- wolf, grass, snake, tiger
- frog, snake, eagle, grass, grasshopper
One of the following is a micro-consumer. This one is :
(a) ant
(b) lice
(c) fungi
(d) mosquito
What would happen to the number of rabbits and grass plants if the number of foxes decreased?
Write the percentage of energy transferred from autotrophs to the next level in a food chain.
Explain how harmful chemicals enter our bodies.
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
An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :
(a) water beetles
(b) tadpoles
(c) weeds
(d) fish
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?
(a) snake
(b) eagle
(c) mice
(d) peacock
Write the importance of the food chain.
Which of the following is an autotroph?
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
