Advertisements
Advertisements
Question
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
Advertisements
Solution
dog
The concentration of harmful pesticides in the bodies of birds and animals increases at each trophic level, and hence the dog in the given food chain will have the maximum concentration of harmful pesticides.
APPEARS IN
RELATED QUESTIONS
Give reason to justify the following: The existence of decomposers is essential in a biosphere.
List two biotic components of a biosphere.
List two important roles play in the environment by decomposers.
What will happen if we kill all the organisms in one trophic level?
What is meant by a primary consumer, secondary consumer and a tertiary consumer? Give one example of each.
At which trophic level a person is feeding when he is eating roasted chicken.
At which trophic level a person is feeding when he is eating eggs.
Write one or two word for the following statement/definition :
Organisms which depend on the producers for food either directly or indirectly
What is a 'food web'? Show its formation.
Which of the following represents a possible food chain found in a pond :
| Primary producers |
Primary consumers | Secondary consumers |
| (a) green algae | fish | mosquito larvae |
| (b) fish | green algae | mosquito larvae |
| (c) mosquito larvae | fish | green algae |
| (d) green algae | mosquito larvae | fish |
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 :
Do you think that the food chain given in this question can really be regarded as a food chain? Explain your answer.
In a food chain consisting of grass, frog, bird and insects, where will the concentration of the harmful chemicals be maximum?
What is meant by bioconcentration of pesticides
What does garbage consist of?
What provides the energy which then flows through a food chain?
(a) glucose
(b) oxygen
(c) respiration
(d) sunlight
Which of the following is a logical sequence of food chain?
______ obtained energy from the chemical breakdown of dead organisms.
The sequence of who eats whom in an ecosystem is called as ______.
Which 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
