Advertisements
Advertisements
प्रश्न
Which of the following constitute a food-chain?
विकल्प
Grass, wheat and mango
Grass, goat and human
Goat, cow and elephant
Grass, fish and goat
Advertisements
उत्तर
Grass, goat and human
Explanation:
Grass is eaten by goats, and goats are eaten by humans. Grass, goat and human serve as various trophic levels of a food chain as shown below:
\[\ce{\underset{(Producer)}{Grass} -> \underset{(Herbivore)}{Goat} -> \underset{(Omnivore)}{Human}}\]
APPEARS IN
संबंधित प्रश्न
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
The following statement is true or false :
In biology, human beings are called producers.
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?
Write a common food chain of a pond ecosystem having four links.
If a grasshopper is eaten by a frog, then the energy transfer will be from ______.
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms in the food chain are herbivore, and carnivores?
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms are (i) predators, and (ii) prey?
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
Explain how harmful chemicals enter our bodies.
Which common pesticide has accumulated in human body in considerable amounts?
Which of the following gets the minimum energy through the food chain in an ecosystem?
(a) carnivore
(b) large carnivore
(c) producer
(d) herbivore
A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird
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?
Your mother always thought that fruit juices are very healthy for everyone. One day she read in the newspaper that some brands of fruit juices in the market have been found to contain certain level of pesticides in them. She got worried as pesticides are injurious to our health.
(a) How would you explain to your mother about fruit juices getting contaminated with pesticides?
(b) It is said that when these harmful pesticides enter our body as well as in the bodies of other organisms they get accumulated and beyond a limit cause harm and damage to our organs. Name the phenomenon and write about it.
What would happen if an organism is removed from the food chain?
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
Which of the following is a logical sequence of food chain?
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
